The OP shouldn't have clicked on Durandel. It was full when they selected it. Had they left it at Default merged world, they would have ended up on Durandel. But they already know this now.
It was user error, but SE is still partly to blame. The way it should have worked is if you choose a server that is full it should have automatically put you back to the default world transfer, not put you on another server entirely since, you know, you didn't actually move anywhere. In this particular case, I hope they fix it for you, OP.