In the past, an AP holder could book up to 3 rooms at the AP discount rate. Now, only 1 room per AP holder. And the AP holder MUST be booked into the room in order to get the discount. Sorry for the bad news.
Maybe, maybe not. I was allowed to book 2 AP rooms for this past December when plenty of people were reporting they were told only 1 room could be booked. I think I booked in Oct when the discount came out. I specially asked if I could book an additional room for my dad (I was paying) and I was told no problem.