Kind of hard to explain. But lets say I'm writing something on text edit and I close the program/file. Later, I open another/different file thats using text edit. On occasion the old file I was using earlier will open behind the new one. Same thing sometimes with Quicktime. It will open and I assume the most recent one used, behind the new one I'm opening. Its weird. It will do this when I hit the red X as well as when I quit the program. At least thats what i think I have noticed. Running MacBook Pro 13in Early 2011 LION. 
