I think the approval of medical result should be done within a week after it received your report.
Someone may have different interpretation on AOR2, but I think it is an "Acknowledgement of Receipt" which was sent by your vo once it received the documents.
For mine,
AUG 27, my application left Sidney
SEP 12, HKVO sent an email mentioned the application was received, asked for updated Schedule A and police certificate. (AOR2)
OCT 31, Bulletin 1 email was received.
NOV 05, HKVO asked for updated Schedule A again and Client Information (someone call this as Proof of Intention) by GCkey internal message.
next, we shall wait for the followings
- completion of background check
- Pre-arrival service invitation
- Bulletin 2
- someone may be asked for an interview
- Decision Made
- someone may be asked for passport (if your passport is not visa waived)
- COPR