Your Highness said:Zee has already answered your first query approriately.
Some common reasons for rejection are:
CAP has reached
Forms / Documents incomplete
Duties and resposnsibilites do not match with NOC
Gap in calculation of points for education
In case of sponsorship points, family details of the family in Canada not being adequate.
Credit card could not be charged
Your overall points not adding up to 67 points
These are usually the reasons.
Trust this helps
Thanks so much Zee and Your Highness!!