diff --git a/js/components/WindowManager.js b/js/components/WindowManager.js
index 9a7bcae8..aa9c6702 100644
--- a/js/components/WindowManager.js
+++ b/js/components/WindowManager.js
@@ -37,8 +37,6 @@ class WindowManager extends React.Component {
   centerWindows() {
     const { container } = this.props;
 
-    const offsetLeft = container.offsetLeft;
-    const offsetTop = container.offsetTop;
     const width = container.scrollWidth;
     const height = container.scrollHeight;
 
@@ -53,8 +51,8 @@ class WindowManager extends React.Component {
       keys.forEach((key, i) => {
         const offset = WINDOW_HEIGHT * i;
         windowPositions[key] = {
-          x: Math.ceil(offsetLeft + globalOffsetLeft),
-          y: Math.ceil(offsetTop + (globalOffsetTop + offset))
+          x: Math.ceil(globalOffsetLeft),
+          y: Math.ceil(globalOffsetTop + offset)
         };
       });
       this.props.updateWindowPositions(windowPositions);
@@ -69,8 +67,8 @@ class WindowManager extends React.Component {
       const boxWidth = bounding.right - bounding.left;
 
       const move = {
-        x: offsetLeft + (width - boxWidth) / 2,
-        y: offsetTop + (height - boxHeight) / 2
+        x: (width - boxWidth) / 2,
+        y: (height - boxHeight) / 2
       };
 
       const newPositions = info.reduce(