Ah right there has been some crossed wires. Two irc channels have formed on two different servers (some of us have been using irc.efnet.net). You've been connecting to the default server option for mibbit.
Not that there's anything wrong with that... I don't really know what the solution is on what server to use. I suspect that it's best if the people who've been using efnet jump over to irc.mibbit.net which is the other server.