The only way this is currently working for me, is if I give my map and my bar the same single anchor, but I want my map to stretch. I guess for now, I may be able to limit myself to using the top-left corner of the map. But, I wanted to place it on the top-right.
Set the map Anchors to what you want them to be, then fiddle with a single anchor's X% on the bar until you get it sitting just where you want it when you stretch the screen.