So I just got review privileges, and I was given this answer to review: https://stackoverflow.com/a/20378044/2963903 (https://stackoverflow.com/review/first-posts/3696530)
It was listed as two hours old, with no user. I opened the question, saw the answer from Chris, saw the wrong timestamp, and did not see the two-hour-old version. I thought that it was a copied answer (timestamps! you've failed me again), and concluded that "First Answers" might be hidden until it was approved in review. So I clicked "flag".
Maybe add some text saying, "Note: this answer is already up" (not in those words, obviously), or rather, have the text in the Queues page. (I already know just one audit failure won't count against me.)
Others who failed this: