Did you get the AOR email?
The ecas still just shows mine at Application Received so it seems things are updated at different times.
I wouldn't get paranoid about it honestly, they just may be slow on sending out an email or the person working on your file missed the email address or mistyped it and it returned, then they just mailed it out. Could be a bunch of different reasons so no worries, it will be good news when you get it.

And you did check the spam/junk folder right? I saw someone else here state they had their g-mail set up in a manner where it auto-filed it to a specific folder.