This means that's the sponsor will be approved or rejected. If approved the next step is that they will foward the permanent resident application to your local visa office.
I have
1. We received your application for permanent resident 0ctober 21st 2014
2. We started to process your application March 9th 2015
3. Medical received
And it says in process on Ecas
But I got passport request on March 11th 2015
Mine is almost exact but mine was files October 2014. I got my AOR2 March 9th and PP request March 11th. My Ecas has under PR
1. Application received
2. Application started process March 7th
3 medical received
What does yours say?