Hi Romain.
It's tough to tell you what to expect next. The Buffalo visa office is apparently in the process of moving over from an old computer system to a new one, so there are some things that are uncertain. For example, many of the Buffalo people in the February thread have already received their AOR's (as an update on eCAS saying their applications have been received), while many in December and January are still waiting.
I think generally speaking they are sending our AOR's out as they start to process our files. I received my AOR via e-mail on March 7. I was unable to log into eCAS until the 15th, and then my eCAS was activated and my sponsors was updated with the information that they had started processing my file on March 7.
So, at this point, maybe they're just scanning in the rest of December and January to get all the AOR's out? Or maybe you're In Process, but it won't be updated until Tuesday (when most eCAS updates happen). Some people's eCAS show that Medicals have been received, and some people's don't.
What you're expecting next is also uncertain. My personal thought is that they will probably send us a paper AOR with barcodes in case we need to send anything else in. Many people receive an "Initial Assessment." But... Some don't get either of those things, and the next thing they get is a PPR. :-\
CIC is very inconcisitant. My guess is that you are In Process - it just won't show until the bigger eCAS update on Tuesday.
