回複：4月中旬以來寄到NSC的I-485申請，有收到receipt的嗎？

You mailed your I-485 on 4/16/05. Your PD have not became current on the date. You should mail your AOS after May 1. USCIS may reject your case since no visa number availble for you.
I suggest you contact USCIS ASAP. You may have to mailed your AOS + processing fee again.