out to sea,
i'm pretty sure the invites and invite times were for everybody. I think the shortlist is for the entire applicant pool, not just int'l applicants. From what I've heard the annual intake of GH students is only 10-12 per year.
As for filling a canadian quota, I don't believe there is one. See here: https://uofa.ualberta.ca/public-health/programs/admissions/applicant-profile
32% international applicants.
Someone else commented on UofA's transparency, and I figure I'd give my two cents.
I've been at UofA for 5 years and have applied to various grad/professional programs over a few years and without a doubt UofA is the absolute worst school for transparency. Great programs, not doubt, but it's like pulling blood from a stone to get anyone from admin to directly answer your questions. They don't want to reveal any evaluation criteria, nor do they want to give any sort of timeline. It has been immensely frustrating, especially since most other universities seem to be very accomodating. Pros/cons, I suppose.