If you're worried, I would give CIC a call and just make sure that your contact information is correct. At the beginning of the process, I saw that someone on the same timeline as I was received their AOR before me even though they had sent their application weeks after I had sent mine. I called CIC and politely asked them to clarify my contact information and found out that the e-mail they had on file for me was wrong by a single character and therefore I never received an e-mail from them for my AOR even though they had sent one. We never received a snail mail letter letting us know we had AOR even though our mailing address was correct.
I would give them a call to see what's going on if for nothing more than to put your mind at ease.