I want to preface that Casey, as a person, is actually quite nice. But, at the end of the day, a friendly person doesn't always make a competent teacher.
Not only was the test poorly worded, it was almost intentionally confusing and misleading. I can understand difficult teachers and I can most definitely sympathize with teaching an application-based view of Biology. That being said, I cannot fathom how any teacher would create questions on an exam, pset, lab, or practice final without proof-reading first and checking for clarity. You're right; I think she stopped caring.
I don't expect these classes to be easy; the program has a reputation for being stringent. However, I feel like we were nearly sabotaged. Between the class structure, the typos, the convoluted approach to presenting material (the book had it right), forgoing exam reviews, and the harshest lab rubric I've ever seen, it is amazing that 15% could even get above the average. This is my medical school admission we are talking about. I have an absolute right to be upset - and I am. I worked hard in the class; I worked really freaking hard. My lab TF was the only redeeming thing about the course. He was fantastic. This negativity streams from the fact that she didn't seem to care if we succeeded or failed; just that we sat quietly, didn't ask questions, and took it.
This class has sincerely made me consider dropping HCP and taking Bio II somewhere else.