diff --git a/app/classes/Framadate/Services/InputService.php b/app/classes/Framadate/Services/InputService.php
index 0a06a68..2c5e1da 100644
--- a/app/classes/Framadate/Services/InputService.php
+++ b/app/classes/Framadate/Services/InputService.php
@@ -76,12 +76,14 @@ class InputService {
     public function filterMD5($control) {
         return filter_var($control, FILTER_VALIDATE_REGEXP, ['options' => ['regexp' => MD5_REGEX]]);
     }
-    
+
     public function filterInteger($int) {
-          if (filter_var($int, FILTER_VALIDATE_INT)) {
-              return $int;
-       }  
-      return  null;
+        return filter_var($int, FILTER_VALIDATE_INT);
+    }
+
+    public function filterValueMax($int)
+    {
+        return $this->filterInteger($int) >= 1;
     }
 
     public function filterBoolean($boolean) {
diff --git a/create_poll.php b/create_poll.php
index 48d67b9..91b8ed0 100644
--- a/create_poll.php
+++ b/create_poll.php
@@ -57,7 +57,7 @@ if ($goToStep2) {
     $title = $inputService->filterTitle($_POST['title']);
 
     $use_ValueMax = isset($_POST['use_ValueMax']) ? $inputService->filterBoolean($_POST['use_ValueMax']) : false;
-    $ValueMax = $use_ValueMax === true ? $inputService->filterInteger($_POST['ValueMax']) : null;
+    $ValueMax = $use_ValueMax === true ? $inputService->filterValueMax($_POST['ValueMax']) : null;
 
     $use_customized_url = isset($_POST['use_customized_url']) ? $inputService->filterBoolean($_POST['use_customized_url']) : false;
     $customized_url = $use_customized_url === true ? $inputService->filterId($_POST['customized_url']) : null;
@@ -98,10 +98,8 @@ if ($goToStep2) {
     $_SESSION['form']->use_password = ($use_password !== null);
     $_SESSION['form']->results_publicly_visible = ($results_publicly_visible !== null);
 
-    if ($config['use_smtp'] === true) {
-        if (empty($mail)) {
-            $error_on_mail = true;
-        }
+    if ($config['use_smtp'] === true && empty($mail)) {
+        $error_on_mail = true;
     }
 
     if ($title !== $_POST['title']) {
@@ -117,11 +115,8 @@ if ($goToStep2) {
         }
     }
 
-	if ($use_ValueMax) {
-		if ($use_ValueMax === false) {
-            $error_on_ValueMax = true;
-			$error_on_customized_url_msg = __('Error', 'Mauvaise valeur');
-        }
+	if ($use_ValueMax && $ValueMax === false) {
+        $error_on_ValueMax = true;
 	}
 
     if ($name !== $_POST['name']) {
@@ -234,7 +229,7 @@ if (!empty($_POST[GO_TO_STEP_2])) {
     if ($error_on_customized_url) {
         $errors['customized_url']['aria'] = 'aria-describeby="customized_url" ';
         $errors['customized_url']['class'] = ' has-error';
-        $errors['customized_url']['msg'] = isset($error_on_customized_url_msg) ? $error_on_customized_url_msg : __('Error', 'Something is wrong with the format');
+        $errors['customized_url']['msg'] = isset($error_on_customized_url_msg) ? $error_on_customized_url_msg : __('Error', "Something is wrong with the format: customized urls should only consist of alphanumeric characters and hyphens.");
     }
 
     if ($error_on_description) {
@@ -250,7 +245,7 @@ if (!empty($_POST[GO_TO_STEP_2])) {
     } elseif ($error_on_name) {
         $errors['name']['aria'] = 'aria-describeby="poll_name_error" ';
         $errors['name']['class'] = ' has-error';
-        $errors['name']['msg'] = __('Error', 'Something is wrong with the format');
+        $errors['name']['msg'] = __('Error', "Something is wrong with the format: name shouldn't have any spaces before or after");
     }
 
     if (empty($_POST['mail'])) {
@@ -276,7 +271,7 @@ if (!empty($_POST[GO_TO_STEP_2])) {
 	if ($error_on_ValueMax) {
         $errors['ValueMax']['aria'] = 'aria-describeby="poll_ValueMax" ';
         $errors['ValueMax']['class'] = ' has-error';
-        $errors['ValueMax']['msg'] = __('Error', 'error on ValueMax');
+        $errors['ValueMax']['msg'] = __('Error', 'Error on amount of voters limitation : value must be an integer greater than 0');
     }
 }
 
@@ -285,6 +280,7 @@ $useRemoteUser = USE_REMOTE_USER && isset($_SERVER['REMOTE_USER']);
 $smarty->assign('title', $title);
 $smarty->assign('useRemoteUser', $useRemoteUser);
 $smarty->assign('errors', $errors);
+$smarty->assign('advanced_errors', $goToStep2 && ($error_on_ValueMax || $error_on_customized_url || $error_on_password || $error_on_password_repeat));
 $smarty->assign('use_smtp', $config['use_smtp']);
 $smarty->assign('default_to_marldown_editor', $config['markdown_editor_by_default']);
 $smarty->assign('goToStep2', GO_TO_STEP_2);
diff --git a/locale/ar.json b/locale/ar.json
index 8068fa0..ab63d52 100644
--- a/locale/ar.json
+++ b/locale/ar.json
@@ -328,7 +328,7 @@
       "All voters can modify any vote": "All voters can modify any vote",
       "Customize the URL": "Customize the URL",
       "Go to step 2": "الإنتقال إلى الخطوة 2",
-      "Limit the ammount of voters per option": "Limit the amount of voters per option",
+      "Limit the amount of voters per option": "Limit the amount of voters per option",
       "More informations here:": "المزيد من التفاصيل هنا :",
       "Only the poll maker can see the poll's results": "Only the poll maker can see the poll results",
       "Optional parameters": "Optional parameters",
diff --git a/locale/br.json b/locale/br.json
index 01ca765..11cdead 100644
--- a/locale/br.json
+++ b/locale/br.json
@@ -328,7 +328,7 @@
       "All voters can modify any vote": "An holl vouezhierien a c'hall kemmañ an holl vouezhioù",
       "Customize the URL": "Personelaat an ere",
       "Go to step 2": "Mont d'ar bazenn 2",
-      "Limit the ammount of voters per option": "Limit the amount of voters per option",
+      "Limit the amount of voters per option": "Limit the amount of voters per option",
       "More informations here:": "Titouroù ouzhpenn amañ:",
       "Only the poll maker can see the poll's results": "N'eus nemet krouer ar sontadeg a c'hell gwelet an disoc'hoù",
       "Optional parameters": "Arventennoù diret",
diff --git a/locale/de.json b/locale/de.json
index 281e4ad..cd13108 100644
--- a/locale/de.json
+++ b/locale/de.json
@@ -328,7 +328,7 @@
       "All voters can modify any vote": "Jeder Teilnehmer kann jede abgegebene Wertung ändern",
       "Customize the URL": "Link anpassen",
       "Go to step 2": "Weiter zum 2. Schritt",
-      "Limit the ammount of voters per option": "Begrenzung der anzahl der aähler pro option",
+      "Limit the amount of voters per option": "Begrenzung der anzahl der aähler pro option",
       "More informations here:": "DE_Plus d'informations ici :",
       "Only the poll maker can see the poll's results": "Einzig der Autor der Abstimmung kann die Ergebnisse einsehen",
       "Optional parameters": "Optionale Einstellungen",
diff --git a/locale/en.json b/locale/en.json
index 1d23cb8..2925cd4 100644
--- a/locale/en.json
+++ b/locale/en.json
@@ -142,7 +142,10 @@
       "Poll id already used": "Identifier is already used",
       "Something is going wrong...": "Something has gone wrong...",
       "Something is wrong with the format": "Something is wrong with the format",
+      "Something is wrong with the format: customized urls should only consist of alphanumeric characters and hyphens.": "Something is wrong with the format: customized urls should only consist of alphanumeric characters and hyphens.",
+      "Something is wrong with the format: name shouldn't have any spaces before or after": "Something is wrong with the format: name shouldn't have any spaces before or after",
       "The address is not correct! You should enter a valid email address (like r.stallman@outlock.com) in order to receive the link to your poll.": "The address is not correct! You should enter a valid email address (like r.stallman@outlock.com) in order to receive the link to your poll.",
+      "Error on amount of voters limitation : value must be an integer greater than 0": "Error on amount of voters limitation : value must be an integer greater than 0",
       "The column already exists": "The column already exists",
       "The name is invalid.": "The name is invalid.",
       "The name you've chosen already exist in this poll!": "The name you've chosen already exists in this poll!",
@@ -328,7 +331,7 @@
       "All voters can modify any vote": "All voters can modify any vote",
       "Customize the URL": "Customize the URL",
       "Go to step 2": "Go to step 2",
-      "Limit the ammount of voters per option": "Limit the amount of voters per option",
+      "Limit the amount of voters per option": "Limit the amount of voters per option",
       "More informations here:": "More informations here:",
       "Only the poll maker can see the poll's results": "Only the poll maker can see the poll results",
       "Optional parameters": "Optional parameters",
diff --git a/locale/es.json b/locale/es.json
index c47caa9..66f9aae 100644
--- a/locale/es.json
+++ b/locale/es.json
@@ -328,7 +328,7 @@
       "All voters can modify any vote": "Los votos pueden ser modificados por cualquiera",
       "Customize the URL": "ES_Personnaliser le lien",
       "Go to step 2": "Ir al paso número 2",
-      "Limit the ammount of voters per option": "Limitar el número de votantes por opción",
+      "Limit the amount of voters per option": "Limitar el número de votantes por opción",
       "More informations here:": "ES_Plus d'informations ici :",
       "Only the poll maker can see the poll's results": "Solo el creador de la encuesta puede ver los resultados",
       "Optional parameters": "ES_Paramètres optionnels",
diff --git a/locale/fr.json b/locale/fr.json
index 0e28bcd..919c970 100644
--- a/locale/fr.json
+++ b/locale/fr.json
@@ -142,7 +142,10 @@
       "Poll id already used": "L'identifiant est déjà utilisé",
       "Something is going wrong...": "Quelque chose ne va pas...",
       "Something is wrong with the format": "Quelque chose ne va pas avec le format",
+      "Something is wrong with the format: customized urls should only consist of alphanumeric characters and hyphens.": "Quelque chose ne va pas avec le format: les urls personalisées devraient contenir uniquement des caractères alphanumériques et des tirets.",
+      "Something is wrong with the format: name shouldn't have any spaces before or after": "Quelque chose ne va pas avec le format : le nom ne devrait pas contenir d'espaces avant ou après",
       "The address is not correct! You should enter a valid email address (like r.stallman@outlock.com) in order to receive the link to your poll.": "L'adresse saisie n'est pas correcte ! Il faut une adresse électronique valide (par exemple r.stallman@outlock.com) pour recevoir le lien vers le sondage.",
+      "Error on amount of voters limitation : value must be an integer greater than 0": "Erreur sur le nombre maximum de votants : la valeur doit être un entier supérieur à 0",
       "The column already exists": "La colonne existe déjà",
       "The name is invalid.": "Le nom n'est pas valide.",
       "The name you've chosen already exist in this poll!": "Le nom que vous avez choisi existe déjà !",
@@ -328,7 +331,7 @@
       "All voters can modify any vote": "Tou·te·s les sondé·e·s peuvent modifier tous les votes",
       "Customize the URL": "Personnaliser le lien",
       "Go to step 2": "Aller à l'étape 2",
-      "Limit the ammount of voters per option": "limiter le nombre de votants par option",
+      "Limit the amount of voters per option": "limiter le nombre de votants par option",
       "More informations here:": "Plus d'informations ici :",
       "Only the poll maker can see the poll's results": "Seul le ou la créateur·rice du sondage peut voir les résultats",
       "Optional parameters": "Paramètres facultatifs",
diff --git a/locale/fr_FR.json b/locale/fr_FR.json
index 0e28bcd..f995955 100644
--- a/locale/fr_FR.json
+++ b/locale/fr_FR.json
@@ -142,7 +142,10 @@
       "Poll id already used": "L'identifiant est déjà utilisé",
       "Something is going wrong...": "Quelque chose ne va pas...",
       "Something is wrong with the format": "Quelque chose ne va pas avec le format",
+      "Something is wrong with the format: customized urls should only consist of alphanumeric characters and hyphens.": "Quelque chose ne va pas avec le format : les urls personalisées devraient contenir uniquement des caractères alphanumériques et des tirets.",
+      "Something is wrong with the format: name shouldn't have any spaces before or after": "Quelque chose ne va pas avec le format : le nom ne devrait pas contenir d'espaces avant ou après",
       "The address is not correct! You should enter a valid email address (like r.stallman@outlock.com) in order to receive the link to your poll.": "L'adresse saisie n'est pas correcte ! Il faut une adresse électronique valide (par exemple r.stallman@outlock.com) pour recevoir le lien vers le sondage.",
+       "Error on amount of voters limitation : value must be an integer greater than 0": "Erreur sur le nombre maximum de votants : la valeur doit être un entier supérieur à 0",
       "The column already exists": "La colonne existe déjà",
       "The name is invalid.": "Le nom n'est pas valide.",
       "The name you've chosen already exist in this poll!": "Le nom que vous avez choisi existe déjà !",
@@ -328,7 +331,7 @@
       "All voters can modify any vote": "Tou·te·s les sondé·e·s peuvent modifier tous les votes",
       "Customize the URL": "Personnaliser le lien",
       "Go to step 2": "Aller à l'étape 2",
-      "Limit the ammount of voters per option": "limiter le nombre de votants par option",
+      "Limit the amount of voters per option": "limiter le nombre de votants par option",
       "More informations here:": "Plus d'informations ici :",
       "Only the poll maker can see the poll's results": "Seul le ou la créateur·rice du sondage peut voir les résultats",
       "Optional parameters": "Paramètres facultatifs",
diff --git a/locale/it.json b/locale/it.json
index de4939f..6bfa519 100644
--- a/locale/it.json
+++ b/locale/it.json
@@ -328,7 +328,7 @@
       "All voters can modify any vote": "Tutti i votanti possono cambiare tutti i voti",
       "Customize the URL": "Personalizzare il link",
       "Go to step 2": "Andare al punto 2",
-      "Limit the ammount of voters per option": "Limitare la quantità di elettori per opzione",
+      "Limit the amount of voters per option": "Limitare la quantità di elettori per opzione",
       "More informations here:": "IT_Plus d'informations ici :",
       "Only the poll maker can see the poll's results": "Solo il creatore sondaggio possono vedere i risultati",
       "Optional parameters": "Parametri opzionali",
diff --git a/locale/nl.json b/locale/nl.json
index 1c54aa5..df17907 100644
--- a/locale/nl.json
+++ b/locale/nl.json
@@ -328,7 +328,7 @@
       "All voters can modify any vote": "Alle stemmers kunnen elke stem aanpassen",
       "Customize the URL": "Link verpersoonlijken",
       "Go to step 2": "Ga naar stap 2",
-      "Limit the ammount of voters per option": "Limit the amount of voters per option",
+      "Limit the amount of voters per option": "Limit the amount of voters per option",
       "More informations here:": "More informations here:",
       "Only the poll maker can see the poll's results": "Alleen degene die de poll aangemaakt heeft kan de resultaten zien",
       "Optional parameters": "Optionele parameters",
diff --git a/locale/oc.json b/locale/oc.json
index 1b0f45a..1bb797c 100644
--- a/locale/oc.json
+++ b/locale/oc.json
@@ -328,7 +328,7 @@
       "All voters can modify any vote": "Totes los votants pòdon modificar sos vòtes",
       "Customize the URL": "Personalizar lo ligam",
       "Go to step 2": "Anar a l’etapa 2",
-      "Limit the ammount of voters per option": "Limitar lo nombre de votants per opcion",
+      "Limit the amount of voters per option": "Limitar lo nombre de votants per opcion",
       "More informations here:": "Mai d’informacion aquí :",
       "Only the poll maker can see the poll's results": "Solament lo creator del sondatge pòt veire los resultats",
       "Optional parameters": "Paramètres opcionals",
diff --git a/tpl/create_poll.tpl b/tpl/create_poll.tpl
index fe87f9a..59353e3 100644
--- a/tpl/create_poll.tpl
+++ b/tpl/create_poll.tpl
@@ -28,7 +28,7 @@
                         {if $useRemoteUser}
                             <input type="hidden" name="name" value="{$form->admin_name}" />{$form->admin_name}
                         {else}
-                            <input id="yourname" type="text" name="name" class="form-control" {$errors['name']['aria']} value="{$poll_name|html}" />
+                            <input id="yourname" type="text" required name="name" class="form-control" {$errors['name']['aria']} value="{$poll_name|html}" />
                         {/if}
                     </div>
                 </div>
@@ -51,7 +51,7 @@
                         {if $useRemoteUser}
                             <input type="hidden" name="mail" value="{$form->admin_mail}">{$form->admin_mail}
                         {else}
-                            <input id="email" type="text" name="mail" class="form-control" {$errors['email']['aria']} value="{$poll_mail|html}" />
+                            <input id="email" required type="email" name="mail" class="form-control" {$errors['email']['aria']} value="{$poll_mail|html}" />
                         {/if}
                     </div>
                 </div>
@@ -69,7 +69,7 @@
                     <label for="poll_title" class="col-sm-4 control-label">{__('Step 1', 'Poll title')} *</label>
 
                     <div class="col-sm-8">
-                        <input id="poll_title" type="text" name="title" class="form-control" {$errors['title']['aria']}
+                        <input id="poll_title" type="text" name="title" class="form-control" required {$errors['title']['aria']}
                                value="{$poll_title|html}"/>
                     </div>
                 </div>
@@ -111,7 +111,7 @@
                     <span class="lead visible-xs-inline">
                         <i class="glyphicon glyphicon-cog" aria-hidden="true"></i>
                     </span>
-                    <a class="optionnal-parameters collapsed lead" role="button" data-toggle="collapse" href="#optionnal" aria-expanded="false" aria-controls="optionnal">
+                    <a class="optionnal-parameters {if !$advanced_errors}collapsed{/if} lead" role="button" data-toggle="collapse" href="#optionnal" aria-expanded="{if $advanced_errors}false{else}true{/if}" aria-controls="optionnal">
                         {__('Step 1', "Optional parameters")}
                         <i class="caret" aria-hidden="true"></i>
                         <i class="caret caret-up" aria-hidden="true"></i>
@@ -121,32 +121,32 @@
                 <div class="clearfix"></div>
 
 
-                <div class="collapse" id="optionnal">
+                <div class="collapse{if $advanced_errors} in{/if}" id="optionnal" {if $advanced_errors}aria-expanded="true"{/if}>
                 {* Poll identifier *}
 
                     <div class="form-group {$errors['customized_url']['class']}">
 
                         {* Value MAX *}
-                        <div class="form-group">
+                        <div class="form-group {$errors['ValueMax']['class']}">
                                     <label for="use_valueMax" class="col-sm-4 control-label">
                         {__('Step 1', 'Value Max')}<br/>
                                     </label>
                                     <div class="col-sm-8">
                                         <div class="checkbox">
                                             <label>
-                                                <input id="use_ValueMax" name="use_ValueMax" type="checkbox" >
-                                    {__('Step 1', "Limit the ammount of voters per option")}
+                                                <input id="use_ValueMax" name="use_ValueMax" type="checkbox" {if $use_ValueMax}checked{/if}>
+                                    {__('Step 1', "Limit the amount of voters per option")}
                                 </label>
                                         </div>
                                     </div>
                         </div>
 
-                        <div class="form-group">
-                            <div id="ValueMax"{if !$use_ValueMax} class="hidden"{/if}>
+                        <div class="form-group {$errors['ValueMax']['class']}">
+                            <div id="ValueMax" {if !$use_ValueMax}class="hidden"{/if}>
 
                                 <div class="col-sm-offset-4 col-sm-8">
                                     <label>
-                                            <input id="ValueMax" type="number" min= "0" name="ValueMax">
+                                            <input id="ValueMax" type="number" min="0" name="ValueMax" value="{$ValueMax|html}" {$errors['ValueMax']['aria']}>
 
                                             {__('Step 1', "ValueMax instructions")}
                                     </label>
@@ -155,6 +155,14 @@
                             </div>
                        </div>
 
+                        {if !empty($errors['ValueMax']['msg'])}
+                            <div class="alert alert-danger">
+                                <p id="poll_customized_url_error">
+                                    {$errors['ValueMax']['msg']}
+                                </p>
+                            </div>
+                        {/if}
+
 
                         {* Poll identifier *}
                         <div class="form-group {$errors['customized_url']['class']}">