So I submitted my last unit a few weeks ago and received a grade for it a few days ago. There wasn't any information on the portal regarding the certificate and the certification logo wasn't appearing in the "Resources" tab. I then spoke to an agent in the portal window and upon our conversation, she marked me as a "graduate" only after I TOLD her, and immediately I received an email regarding my "graduate" status and info regarding my certificate. (Should take a week or two to arrive!)
So be sure to contact them so they can officially mark you! Also, make sure your address is correct in your account info
I hope this helps someone