We lived in NSC until our 1st FP and 1st EAD got from NSC. Later company moved us to CA. Our 2nd EAD got approved from NSC.
Our 2nd FP request was made from NSC, where ever FBI sends the FP results..., your FP are attached to your A# and Lin#, it is a number attached to you and you alone, why bother..., As long as your FP is completed and USCIS recieves them, thats fine.
Recently, NSC approved my 7th year H1, eventhough my address of work is CA. As on today, according to our attorney, my 485 is with NSC and will be process by NSC.