Observe in the review history (10k+ only, will get pushed down as more reviews occur) that a user reviewed the same question for reopening less than an hour apart (screenshot for posterity):
Looking at the question's timeline, that user's first review completed the review task at 18:58, and the user performed a second reopen review of the question at 19:56. I am not seeing anything else in the question's history that would have pushed the question back into the review queue for that user.
It seems that the reopen vote count on the question went from 1 to 2 after the first review was completed with "Leave Closed x 3", but I did not think that would have put the post back into the queue, at least, not for the same reviewers (I did not receive the question for review again).
What is going on here?