Just logged to mykol with a banned 68 sin. Usually it said banned 999 days. I was partied with a 3rd party user at the time, Doh!!!
But on mykol it didn't say anything about being banned.
So I tried to log him into the game and BINGO, it worked. Now got 2 x shard +8's full shell +7/12 set, 2 x rols, 2 x elf belt. and 18 gbs. I just transferred quick as I could to mule character.
I have 2 other banned accounts and they still get the "server undergoing maintenance" message.
Try now, maybe they have messed up again? Dunno its bloody strange but I'm one very very happy bunny atm