Recently active topics in plasq tagged with skitch-on-skitch action

Whenever the Skitch window is open on my page, and I attempt to take a new screenshot, if the selected area is anywhere over the Skitch box (even if the Skitch box is behind several other windows in the background) I get a snapshot of the open Skitch box instead of whatever i was trying to capture.

I can solve the problem by closing the Skitch window and redoing the screen capture, but I'd prefer to avoid this problem in the first place. Why does it happen? How can i avoid it? Is it a bug in the product or something else?