From what I can tell, you used the new self-service registration application, in which you would have provided your SNTC Contract # and device Serial Number. The system uses that information to retrieve the device install site name & address, then asks you to confirm that information before proceeding. If the install site information is not correct on your service contract, you will need to get that fixed. I would recommend that you contact your partner or Cisco seller to update your service contract before we proceed with any other changes in your CSAM registration. Otherwise, any changes we might make now could again be out-of-sync once the contract gets updated.
I have also sent you an email to get some more information so that we can try to help you resolve this.