Today I saw this question in the close vote review queue, which was flagged as exact duplicate of another question. Paradoxically, the possible duplicate was closed because it was a duplicate of the question that was being voted to be closed.
Obivously, one of them is an exact duplicate of the other one, but in my opinion it doesn't make sense that both should be closed because they are mutually duplicates.
Shouldn't this situations be automatically detected by the system, so you can vote only one of this question as a duplicate of the other one?
It looks like this new user is a bit impatient, because this is the third time he asks the same question. However, in that case the next two times he has asked it they should be closed as duplicates of the original one instead of between them.