If you rent "points" you are purchasing a reservation that another member made with their points and they fully control until you check in. If you want to add a few nights, you need a one time transfer in of points (you are limited to one transfer in or out each UY). If you transfer points and want to use them at 11 months out, they must match your resort and your UY. Otherwise, if they don't match your UY, you will need to call to make the reservation and lose the one hour headstart. If they don't match your resort that you want to book at 11 months out, you can't use them until seven months out. And you still need to call MS since they don't match UY and resort.