Update to my application:

Called uscis after a month of still never receiving an RFE letter and already requesting a new one to be sent. They said that on Oct 25th, they sent me an email to disregard the RFE notice and that I my i821d was actually approved that same day. Which makes sense, seeing how I've already received my EAD card on oct 31st and my ssn came in the mail today. Still, I don't understand why it had to be so complicated. lol. but yay mee.