Hey Rainbow,
Sorry for the confusion... here is my timeline:
1) Application Filed: June 22,2015
2) Sponsor Approved: August,2015
3) Additional Document Requested: October, 2015 (request was for my husband's national ID card)
4) More Additional Document Requested: January, 2016 (My husband completed his masters in UK so 2nd request was for copy of his UK student visa stamps and his Canadian brother's PIF which we submitted in Feb, 2016 and have not heard back from them since then
.
I knew never this spousal sponsor was such a complicated process....I guess patience is the key.