I already mentioned my situation earlier, but to say it again, I am Aug 16th, 2013 applicant and I got the sponsor approval on Nov 10th.
My wife got an email on the same day requesting for marriage certificate and additional documents to prove our relationship.
We didn't include the marriage certificate in the application but we included marriage license and many documents to prove our marriage and relationship is genuine.
We sent the marriage certificate and additional evidence 2 weeks ago and still haven't heard anything back.
The email from CPC said "send these documents by 2015/02/09".
I saw a post by someone else who went through the same situation earlier this year saying that he got the AIP and OWP a week after sending the additional documents.
However, after not hearing anything in 2 weeks, I am starting to think that they might not get back to us until then, which will be 22 months for stage 1. :-[ :-[ :-[