If they don't find a way to fix this or at least enforce it, this is what is going to happen or is already happening.
Buy as many points as you want in the cheapest or readily available resort, do a, 25 or 50 point add-on in the resort you really want, Presto,with a simple transfer you have all your points at your favorite resort.
Don't you think that could have a major affect on availability at whatever resort it happens to be.
I wish I knew that was the way it worked when I bought, and I'll bet others do too.