I know. Every picture I've seen of them from WDW so far has definitely been the same princesses. I feel bad for them, that's just a grueling schedule, especially over the holidays! I can't imagine smiling and being perfect and happy for hours on end, every single day for weeks, while dealing with all sorts of people, at least some of whom must be demanding/rude/cranky/difficult in some way, especially after waiting in line for hours.
I wonder what Disney would have done if one of them had gotten sick, particularly for the Christmas parade taping or Thanksgiving or Christmas. Seems like the princesses must be hugely at risk for catching something, with all the different people they interact with, hugging/kissing kids, etc. It's not like they have a chance to use hand sanitizer or anything in between families!
As for the CMs, my husband has some weird thing about him where people tend to tell him all sorts of things when they're talking to him, even stuff they're not supposed to. It happens all the time at home, and it happened with a bunch of cast members at WDW too.