Is this the usual procedure

[newgrad1234]

I just checked my personal student account, and noticed there was an offer posted. I did not get official email or package yet. Do I accept that link first, and then the official documents will arrive?

[MathCat]

I heard that I was accepted before anything was available on the application portals. Don't click accept to anything there yet, as it might mean accepting the offer! Be patient, or email the department to inquire.

[HistoryGypsy]

I had the same thing happen, more or less.  I just sent a politely eager email to the program director asking if I had really been accepted and, if so, what were the details of the acceptance.  He was very prompt in answering in the affirmative.