My current apple id login name is my old email that I no longer use anymore. I want to change it to my @me.com email address that I use for my email and iCloud. When I try to change it, it says the @me.com is already in use as an apple id. So then I sign out and sign in using my @me.com email, and it redirects me to the iTunes account with my old email. So clearly the two emails are somehow associated, but I don't want my old email (gmail) used for iTunes as I don't use it anymore. I was able to change the actual email over to my me.com one, so I get iTunes receipts at that email, it's just that when I log in it still says my username is the old email.