I don't know if this is correct, but here is my thinking. Previously, when I would split stays between two resorts and wanted UPH tickets, I had to reserve the UPH for my first resort and then to avoid overlapping days, I had to check into my second resort and drop the check in day from the UPH from that resort. So, I got to buy one UPH at a discount and the other had to be bought on site for full price. Now I know i can buy MYW without any hassles or waste. Now all I have to do is see if the AP code comes out to save me enough money on the resort and then buy the rest of my family MYW tickets, with any options that I like. This saves me money and hassles.