-It is very normal in your case. USCIS will send you the notice in advance at least one month before the appointment date.
2,主申請人未收到AP 和 EAD,同時主申請人的所有online case statues 顯示 error.但lp的AP,EAD這周都收到,這兩個case在uscis online 能查到批的通知,但她的485 case 顯示receite # error. 被搞糊塗了,不知這情況正常不?
-Very normal.