I got this message on Feb 10, and later I received pre-arrival letter on Feb 22. But I'm not sure whether it's a sign of update or not cuz many people have received this message and not all of them got updates later.
Thanks for sharing this info! I used to think it was a bug as well, but now I know it meant something! It's really delightful to see those updates even though we don't know what's really going on underneath. It eased the anxiety a lot!
Our timeline is very similar. I received my AOR on Jan 20 as well and my eligibility is completed on Feb 22. I'm still waiting for the background check. It seems they process the applications in different manners. I would say it's a normal timeline so don't stress out yourself. Hope things will...