I'm more than sure you weren't hacking, it's just the fact that blue is using that account to go onto the server to occasionally cheat. I can't be allowing him to do it, however, if you buy an unban, he too is unbanned, since you were banned for "evading ban." I'd highly recommend talking to him about the server, and that he shouldn't be using the account you play on for this server, and that he can use his own, once the unban is purchased. =)