I have a similar problem that apple support hasn't been able to fix for me either. my iTunes purchase apple id is myname. My iCloud account is firstname.lastname@example.org. In the process of trying to fix something I changed the myname's account primary email to something different and now it won't let me change it back because they say email@example.com is another apple id now. So now I can't get my purchase receipts or apple store purchases to my me.com email address! How dumb!
10/17/11 at 12:20pm