Hi Stelam, I hope I could help answering some of your questions, our application started on June 11th 2012. On August 13th of 2012, We got a letter from them saying that I was approved as the sponsor and that our application has been sent to SVO. We DID NOT RECEIVE ANOTHER letter or notification saying that SVO did receive our application.
My wife's ecas shows "Application Received"
We received [my wife's name]'s application for permanent residence on June 11th, 2012.
Medical results have been received.
So starting from August 13th 2012, we heard nothing from them until March 15th 2013, my wife application went in process.
My wife's ecas shows "In Process"
We received (my wife's name)'s application for permanent residence on June 11th, 2012.
We started processing (my wife's name)'s application on March 15, 2013.
Medical results have been received.
Then on April 10th 2013, I received an email from them and they requested an extension of medical check up immediately and to WAIT 4 WEEKS before sending in wife's passport to the IOM. So my wife went immediately on April 11th to do her medical check up at the IOM, and waited 4 weeks until May 10th which was five days ago and summited her passport to the IOM. Now we're just waiting for the SVO to approve her visa and send it back to the IOM, which is approximately 4 - 6 weeks long.
I hope this helps you a bit, good luck.