I'm pretty sure your assessment and pathway's assessment is true. When Hyatt was trying to sell us HPP (and we went pretty far into considering it), they asked to buy x (forget the # now) points to hyattize 1 week, Y points for 2 weeks, Z points for 3 weeks. We had to choose how many of our deeded weeks we wanted the option (for a fee) to play in HPP. Thus I would assume, if you have 1 week Hyattized and then another resale week non-Hyattized, then it's as if you had chosen to buy X # of points and hyattized only 1 week and not chosen to hyattize the other week. The fees to play in HPP killed the deal for us. It was death by a thousand fees. (if we played the shorter stay game, we calculated we would be paying way more fees from the housekeeping fee than in the legacy system booking fee + the conversion fees).