I made a reservation yesterday (forgot the sale didn't start until today). This morning, I called about 8:00 and was put on hold. I went online and could see the sale so booked new rooms at the sale price but stayed on the phone so I could cancel the others.
As I went to book my 2nd room, I noticed under special offers, it said AP summer special (or something like that) but clicking on the link took me to buy APs. So when I got the CM on the phone (after about 25 minutes on hold), I had her convert my 2 new rooms to the AP special (FPs and $20 dining cert) and cancel my old reservation from yesterday.