Hello SnoopyFriends,
Welcome to the community!
Finding changed information on your account would certainly be troubling. While it's possible it could be a glitch, I don't think it would be related to the recent outage. I would be concerned that the change occurred fraudulently, though. You might consider contacting customer service to verify the address had indeed been changed on your account. In addition, they can also be contacted via Live Chat, Facebook, or Twitter. Those methods can be accessed via the contact page posted above.
If the address had been changed (obviously not by yourself), they might refer you to their Fraud department and/or Verification/Validation team in order to get it sorted.
Hope this helps 😀
Cheers
