Interview was moved to a different district, although I didn't move out of district
Here is my short story. Me and my wife applied in March, 2016. We were scheduled for interview in SF district for August, 4. Few weeks before the interview we submitted address change request and later got our confirmation letters. The new physical address is the same city and the mailing address is the different district. Everything remain same for my wife but something wrong happened to my case. It was cancelled and in few days scheduled again for August 30 but in the _different district_ - the Santa Clara district where my mailing address is in.
I have known Mr. Khanna and his team for over 15 years now, and have exclusively used their services any time there has been an immigration related need personally or for my organization. They just have a knack for getting things done and I will unequivocally recommend their services to anyone.