I know that, in simple cases, the alignment is working.
My case is much more complicated, because the application contains a Docking, one pane contains a TabControl and a tab contains the GridView. In addition, the GridView is defined as a custom control (to be reusable).
That's why I can provide you with the application and the source if needed.
I can't want to make it public, but I can give you the information in a private message, if possible.
Note also that the application was working fine until version Q2 2015 is out and you correct something on it...