have you got a server window open that is not connected?
i cant duplicate your problem but in the process of trying, i found another.
any message passed FROM webmaster.webchat.org
would not display the nicks name, and it would also display the message on that server.
as you know its not supposed to msg the room the msg originated from.
i havent got it to stop msging the room, but i fixed the network problem.
also, i couldnt test it on arcor.de.eu.dal.net because they klined my host.