Wacom pen is double clicking everything sort of
So I have Photoshop CS6 and I noticed that when I try to open the toolbar or brush menu it immediately closes, as if someone clicked it again to close it back up. I also noticed that when I press the undo button (mapped onto one of my Wacom pen buttons) it undos the last stroke of paint but at the same time it puts down a new blotch of paint where I hit the undo button on the canvas. It's as if every gesture with my Wacom pen also simultaneously yields a typical "click" or "touch." Consequently, even pressing a button such as "undo" on my pen also simultaneously makes the pen click and produce paint. What the hell is going on? I noticed this was happening in CS5 too.
