I too made several category 7 points advance reservations last night, only to find out that they increased to 85K overnight.
After a few emails back and forth with my ambassador, she said that she'd be able to honor the 60K price. She said to to let her know when I have the points in my account and she will manually adjust the reservation so that it only takes 60K/night from my account.
One interesting challenge when I was talking to her was that there was no way for me to prove that I booked the hotels at 60K points per night. I never received a confirmation email for the bookings I made last night, so there was no way to confirm the date or number of points I used. That said, she was ultimately able to pull the date and time that I made the reservation (i.e., last night), which helped to prove my case.