In reply to your post GLAGAZ, i think MAN will op a 767 for most of the week to Calgary/Vancouver, the YHM was going to be a 757, but not sure it may still go on 767.
Although GSM's web site you can book via the low fare finder but not on the Flight finder. Might be reading to much into it but there are 2 YYZ options up to the 30th.
YYZ route has been doing well, with larger loads than the CPT so not sure why they would pull it.