This completely throws me for a loop, I figured this guy was Gui from the beginning, based on his chat and play style in games I have seen, and when he joined unknownsoldier in the ladder, it seemed much more likely to me(Granted, I am not 100% certain). I am fairly confident he didn't cheat at all, he only played ladder games and that was how he leveled up to like level 30 I had thought. I don't know what happened, my guess is that it is between him and Fizzer, and we won't ever know :(