Hi
AOR means Acknowledgement of Receipt. What you have received is AOR1 which you got from Mississauga. after this you will get SA - Sponsorship Approval.
Two weeks from SA, you may or may not get an email from Delhi saying that they received your file and to pay the RPRF fee and submit Police clearance if not already done. It is a standard email. This is AOR2 or file transfer.
We see that only recently they have started issuing AOR1 ( may be due to long processing time for Stage 1 ).
You should be able to check your Status in Ecas after SA.