Thank you.
Neither I nor my attorney ever received anything about the Oct 3rd RFE. I called two weeks after Oct 3rd and a TSC officer told me that it has been a mistake. In contrary to what he said, all other phone and infopass officers told me that it has been a legitimate RFE but they did not know what it was. Besides, they all refused to give me any more info about the RFE and asked me to let my attorney inquire.
My attorney did inquire but they did not tell him anything. Instead, I received a letter from USCIS a few days ago (<7) saying that they don't know if an RFE has been issued or not and as a result, my case was forwareded to an I-485 supervisor for review. I don't know if that had anything to do with its approval or not. I still have not got anything from them regarding the RFE.
In any case, I think that RFE has been a mistake since my EAD/AP got approved a month after and now I have got the card production email.