I am in same situation here, but little bit different.
I finished 2 years diploma program (Actual length is 16months according to school website), my actual length of study is 22 months. My PGWP is only 14 months. But I found that the program is considered as 2 year diploma program according to Government website and 2 more governme nt related website. (Even it is indicated so in my school guide book for candidates) I went to international student office, they said I can re-apply with explanation letter, and they promised me they will give me a letter from school. However, chances are 50/50. I will try again, but one lawyer said you better ask CIC first what is the reason for that. I don't know whether CIC agent would explain it to me or not. All my friends got 3 years PGWP, I feel so frustrated.
Did anyone re-apply and get up to 3 years?
Please help!!