我3月底辦理EAD/AP combo卡的renew，至今沒有動靜。前幾天發現關於I131怪怪的，大家請看下麵：
On April 12, 2013, your Alien Registration Number was changed relating to your I131, APPLICATION FOR USCIS TRAVEL DOCUMENT. Please check our website at www.uscis.gov for further updates on your case. Please wait until the end of normal processing time before calling customer service at 1-800-375-5283 for live assistance.
1）這個大家遇到過嗎？
2) 為什麽會改變Alien Registration Number
-Technically, you do not have the A# until you get the green card. After you file I-485, USCIS assign an A# to you and after your I-485 is approved, this A# may be your formal A# or USCIS may assign a new A# for you. Then, your formal A# in the green card will not be changed anymore.
