IDE - Set Up Controls Using Dock/anchor?

I created a basic winform project where I want to handle all resizing without writing a single line of code. I set up controls using dock/anchor. They all work properly, until I add a custom UserControl. When I first press F5, the project works fine. However when I get back to the IDE some (but not all) controls which have anchor right/bottom are resized/moved into positions and sizes not previously defined. Some cannot even be restored as they are moved permanently below the container's boundary with coordinates above 2000. If I fiddle around and test the project many times, all controls with right/bottom anchoring will go haywire eventually.

If the custom UserControl has controls inside with right/bottom anchoring those also get resized in weird ways. Adding the controls again solves the problem temporarily. It is the IDE that moves these controls around since these movements are displayed in the undo stack right after I exit testing the project (however,undoing these steps only messes things up even more).I am using VB 2010 on Windows 7 x64.