I had no end of issues with this when I started out. I had setup my keys to be Ctrl-Shift-Q, W, E etc ... and boy that caused some mess. There are several ways to fix this. The way I did it? I have Bongos, and I created a button that is hidden until I mouse-over. I go into key bindings, and then methodically bind every key that I DON'T want to pass to that button (this button does not do anything). I then go to the specific toon that needs the special keybindind and bind just that key for them (or for the 2 that need it). QWEASD (or any shift/ctrl/Alt combination thereof) should probably be bound in this way.

Hope this helps.