I have the similar timeline,
File Received: June, 16th, 2015
AOR: Sept, 03rd, 2015
Medical Request : Jan, 18th, 2016 (approximate time, I don't remember the exact date)
Medical Done: Jan, 22nd, 2016 (approximate time, I don't remember the exact date)
Medical Received: Jan, 25th, 2016 (approximate time, I don't remember the exact date)
Background Information Update request: Feb, 11th, 2016
PCC request: Feb, 12th, 2016
PCC recieved: Feb, 29th, 2016
Passport request: Still waiting
Decision Made: Still waiting
They requested for my background information update because I accidentally put my graduation date as 2014 instead of 2015. I hated myself for that!!
Later, when they requested my PCC from China, it happened to be at the time when it was the biggest holiday in China. So I wouldn't able to get it right away. And it took two weeks for them to receive the document. I know they have received my PCC because I sent them an email inquiring about it.
Since then, I haven't heard from them. So, I am very nervous here.