I called cic and they would not explain what the reasons are. Just pray that they don't wait till middle of July to inform you of a outdated form or request additional information. I submitted application March 20. On April 30, they asked me to mail in a new form. That one new form was recieved at Mississauga on May 8, and they of course told me that is my new application date and they won't look at my file until then. I asked them, will I have to wait until August just for AOR!!???? He really did not understand my question. I explained very slowly, you are only processing three days a week of applications and only now working on stuff received April 4 (when I called this was the date on website). At this rate, it will Be August before getting to May 8. He said yes expect to hear something in August.
For those who are still waiting, if you think there is any possibility something is missing or an old form used or anything like that, send it in now, will likely save you 3 months of waiting for SA.