     {
         // Adjust the partition indexes
         // before the "removed" event is dispatched.
-        noTopMostIndex = noTopMostIndex - 1;
+        noTopMostIndex--;
 
         return rawChildren_removeChild(child);
     }

    {
        // Adjust the partition indexes
        // before the "removed" event is dispatched.
        noTopMostIndex = noTopMostIndex - 1;

        return rawChildren_removeChildAt(applicationIndex + index);
    }

        }

        // Add the application as child 1.
        noTopMostIndex++;
        super.addChildAt(DisplayObject(app), 1);

        CONFIG::performanceInstrumentation
