im no computer expert, but i guess that its a programming mistake that counts you as using a spell or attack as long as you use it on an enemy, cancel back to that person, and re-select a target. itll count towards you using it. so naturally, this makes levelling up alot easier. (and i still dont see why people complain about ffii being hard with this trick...)

after a few hours, you should be levelled up supremely! (though some people dont feel like spending that much time attacking and cancelling...can't blame 'em.)

even worse is the swap trick. use it on a weak enemy, and all your attributes level up. (non-weapon and spell ones of course.)

with so many ways to manipulate the system, ffii isnt hard at all to level up at, so i always laugh a little when people complain about it. (though you dont get swap until mysidia, still.)

well, thats what the attack cancel bug is. nifty, huh?

(and yes, its in origins. not sure about DoS, but it is in origins.)