We can see the minimum CLB for SINP is 4 then CIC shouldn't reject PNP applicants because of that because they met PNP criteria on the time of apply. You applied in 2011 or first quarter in 2012 and in that time CLB7 was not minimum requirement for FSW applicants. It is totally unfair if CIC decide to reject PNP applications based on their IELTS result.
About your case, Don't worry my friend. You will successfully pass that and will get your visa soon
Could you share your timeline? When did you apply and when did SINP asked you to update your documents?