I will quickly update here! My previous post was submitted on 1:29 pm and literally one minute later at 1:30 pm I got an email push notification from my phone, which is exactly the AOR for myself! Another six minutes later my wife's AOR also came in. It's really a big relief as now I know our file has been successfully delivered and acknowledged. The eCAS is still the same (mine came up with one single line, my wife's still not available), but like others' example I will just wait until it shows up. Also both AOR emails contain the attachment with details about our names, UCI, and application numbers.
I was getting really stressed out (although I know I shouldn't have, but it is somehow built into my personality anyway) over the last two weeks after seeing majority of Oct 16 applicants (or over 70% of Oct applicants) have received their AOR. I am really grateful that it came in now so at least I can take a good rest during Christmas and start hoping it turned into in processing after new year. Hopefully things move smoother from now on.
I hope that everyone of you also get past this stage sooner, as I totally understood how it felt when being among the unknown group - I was still thinking about it when I woke up in the middle of night yesterday. Best luck to all.