I think in the grand scheme of things, sometimes we forget that no matter the level of intelligence/skill, these test are still written by humans. Humans are still known to err. It happens and we all catch it on our occasional assignments and/or answer keys. TRUST YOUR KNOWLEDGE AND INSTINCTS and ALWAYS double check. It truly can be such a relieve to realize that a question or answer choice was poorly worded.
Hang in there, check, double check, and TRUST that you're doing your best when you are. For some reason, I felt it necessary to put that out there and I hope it brings comfort to someone who needs to read it.