Thanks for your reply mom2rtk. I WAS about to go right over the edge when I posted here the other night, so I really appreciate you replying. There is nothing I can do to turn back the clock and fix this mess, but you had a good idea -- speak to the school to find out what they plan to do to void this happening in the future. Hopefully something positive can come out of it. These tests are stressful for the kids, and I can't understand why the school would do something to put them at a disadvantage in the first place. As of right now, I still haven't heard a final decision as to whether the tests are invalidated, though my DD is at work right now so I haven't seen her after school today yet.
Just from the parents posting on this thread, it seems like AP classes are not as uniform as you would think they would be. I really feel for you and your daughter -- sounds like it was a stressful morning before the AP test and I hate you feel like you wasted a $100 (but you did give me a good laugh with the "feel like I just lit a $100 on fire"). Is that what they charge the parents to take an AP exam? So interesting--we only pay $10 per test, and a lot of the kids even have that fee waived. My daughter attends a school with a high percentage of economically disaDvantaged students, so I guess that is why we pay so little compared to your daughter's school???? I hope your DD did better on the tests than she thinks she did. My DD had a teacher like yours--she never lectured, not once, the whole school year, so the kids basically read the book and taught themselves the material. How is it possible to "teach" history and not lecture????? And the book was a nightmare--there have been sixteen editions published between the textbook my daughter's class used and the teacher manual the teacher was using, so much of it was ordered differently, and it took multiple complaints from the kids and 4 weeks of school before she figured that out. They even were tested over stuff that the teacher insisted was in chapter 2, but then the students showed her it was on page 560 something.

So kudos to your daughter for persevering and figuring it out on her own as best she could.
I also understand about working. It really does make it hard on the kids during testing times if they work at night, get home late, etc. my kiddo started working when she turned 14 two summers ago--2 nights a week during the school year from 4:00 to 7:30, sometimes more during the summer. I am grateful that her job (coaching gymnastics) is closed for all major holidays, they understand that I don't want her to work more than two nights a week during the school year, and they are pretty understanding when she needs off for a school event (for example she usually works Friday nights, and the prom was two Fridays ago, so they let her work on Thursday night instead.)
I think you said earlier in the thread what your daughter is doing and if she likes it, but I can't remember. Is she liking her job?