Actually, it's not. This is a known issue and has been posted about on here quite a few times.
Well, I guess I should rephrase that. If it is a glitch and Disney makes up the reason as being about the names then that glitch happens a lot because they use that excuse often.
Now, it doesn't make any sense and is a stupid reason to hold up release of MB but I do think it is the reason they get held up.