Sorry for the delayed response... been away! About delays, I don't have any (as I assumed it was against the WoW ToS)... and I don't press "alot" of buttons at once. I AM, however, one of those "button spammers". Perhaps I should back off a bit. Once I cast a spell, and it starts the bar... I immediately start spamming the button of the spell/action that I want to follow-up w/. I'll hit a key about 4-5 a sec... =P Actually, I've been doin' this since I started playin' WoW about 3-3.5 years ago (a few months after it's initial release). Bad habit, and I guess what better way to fix it than w/ a stubborn X-Keys unit!

Edit: Btw, "boxing" doesn't help the matter of stoping the "button spamming" any. Occasionally, it'll take a good 2-3 spams of a button before every character in my setup starts his/her casting.