My sponsor never received an email or letter and he has been watching like a hawk, all I can think is that Canada Post lost it or it was sent to our old address seeing as they haven't seemed to have updated our information, and the new tenant didn't pass that letter on.
The "We started processing your application on April 21, 2015" part is on my sponsors ecas sign in, under the sponsor application part, same with the decision made on May 4th, so I assume that's all only related to the sponsor approval, not the PR part. Under the PR section it says they started processing on May 4th. Does that make more sense or am I confusing it even more? Sorry!