I have also been experiencing this "priorty rewards" problem for a number of destinations, or a simple trip from YYC to either YVR, YYZ, YUL, YEG, YWG. It appears that each time I checked, the options I have must be "priority rewards"...I am almost convinced this might have been the result of the intelligent design as a result of Aeroplan's boss bragging how he knows to manage the program by playing the mouse-cat game. It struck me with so many daily flights from YYC to YVR, almost every option offered to me was "Priority Rewards".