To reproduce bug:

1) Leftmost: Highlight ProjectDefinition.Releases
2) Middle: in the releases list, highlight one of your releases
3) Rightmost: double click on one of the Compiler Variables
pay attention to which one
say you double clicked on the first one
4) Observe the Release properties dialog appears
but the 2nd compiler variable is highlighted

Side note, can you please make the Release properties window much wider
it's modal, there's not reason to have it be so small,
clipping the content of both the variable and the value.