If I may ask, how did your SOP answer questions #1, #2, and #3?
As for question #5, I have no idea how to answer it. Personally, I would suspect one of two things:
1) If there really are large numbers of people doing the same thing that you are, CIC started wondering why. If this is true, then there is nothing you can do.
2) Some of those people had better SOP, or details in their backgrounds that made their applications more reasonable, or slightly higher IELTS scores; something that made CIC less uneasy.
As for question #5, I have no idea how to answer it. Personally, I would suspect one of two things:
1) If there really are large numbers of people doing the same thing that you are, CIC started wondering why. If this is true, then there is nothing you can do.
2) Some of those people had better SOP, or details in their backgrounds that made their applications more reasonable, or slightly higher IELTS scores; something that made CIC less uneasy.