Nah it's okay, it prompted me to double check.
I'm on a Standard account which makes it doubly odd since I can't seem to select any server I already have a character on despite me supposedly having the ability to have up to 8 charcters on a single server.

I've also tried selecting the destination world both before selecting my desired character and after.

I'm assuming now that for some reason I'm on Entry account limits despite being a Standard account.