I registered my macpro on the page u linked. At the end it says there will be a confirmation mail send. I got no message in my mailbox...im sure my id is setup with the correct email.
And when i go to https://supportprofile.apple.com and try to register my MP there it sais its already registered under a different account...im getting confused here...
were do i register/attach a product (like y macbookpro) to my account
some even say here: