Levi, I'm sorry but you can't really get angry about the exam mistakes thing. What usually happens is one of the following (and yeah, it happens in every subject, it happens in third year subjects and probably Honours and Masters coursework too...it just happens):
a: a student identifies the incorrect question and notifies an assessor
b: statistical analysis programs identify the incorrect question when the top tier of students fails to answer it correctly, giving the question a bad score, this basically looks at how 'good' the question was.
After you identify that a question has been written incorrectly, you must appeal to the Board of Examiners to see if the question can be removed. It may be removed but not always. For instance, in Immunology this semester there was a highly ambiguous question that <25% of the class answered correctly (ie chance) and most people thought was incorrect during the exam and kept putting up their hands and being like 'is this correct?'. Afterwards, the coordinator deliberated with the lecturer who wrote the question because it seemed the majority of the class was completely confused by it, including myself, and the coordinator thought it was unfair. If you ask me, there was no correct answer given. But the lecturer who wrote the question stuck by it and said that the answer they chose was definitely correct based on what was taught. Therefore, despite rating poorly in statistical analysis, it will not be removed from our exam and most people just lose a mark on it. THE COOKIE CRUMBLES.
The reason that so many of your questions appear wrong is because they're recycled questions, slightly rephrased or reused multiple times even in the same cohort because you all get different mid semester tests. I know it sucks but it's just honest mistakes, sometimes they get fixed, other times they don't but it's not up to Dawn even as the coordinator to make that decision. Similarly, when there are assessors even lower down the hierarchy executing a grading scheme they usually don't have the power to agree that a question is incorrectly worded and assure that it will be removed.
If so many people in your class are failing there will definitely be a statistical shift.
Why did it take you 3 hours to find an article on Arabidopsis and cancer? I'm just genuinely interested, not trying to make you feel bad or anything - was there a specific criterium that you had to fulfil other than that? I just spent 3 minutes looking and found at least 3 articles since 2011 that have been published on the relationships between Arabidopsis and BRCA genes. I'm only asking because perhaps if you're not going about locating research articles in the most efficient way some of us could give you some tips to enhance your speed!