Was the other account yours, or of someone using your IP, or do you use proxies regularly?
This is complete crap, I keep getting banned by mods for no reason and they're claiming some other account is mine? I've been sat waiting for months for my ban to be over and it's been banned until April? What the serious .
Contact a mod and they will remove it from you. There's no system that removes lobby bans automatically as far as I know.
There's a list of mods under Round>Moderators. Choose one (I advise again at jasprar since he is on vacation), and PM them.