gypsyexpat,
The way it was explained to me when I joined is: QCAA will only accept a DEC applicant that has at least 6 months remaining on his PC. As you were current on the 320 that is what they were offering.
I was given NTR 777 but was coming from another widebody.
Bottom line is QCAA dictates the requirements.
Unfortunately, communication with the applicants apparently isn't that good.
Sorry it didn't work out for you.