As I mentioned on other posts on this forum, quite a few Oct 12/13/16 applicants are still waiting for their AOR. Your case is normal and could take a few more days or even 1-2 weeks. Keep an eye on your email, even on the weekend, and continue to monitor the forum.
Here is a spreadsheet with everyone's tracking info. I see a lot of Oct 17 applicants haven't received AOR yet.