I recently viewed a question that I initially though was a duplicate of another question, so, I voted to close it as such. Anyway, I asked for clarification just in case it wasn't a duplicate. After clarification from OP and a subsequent edit, I realized that it wasn't a duplicate and I revoked my close vote.
The problem is, someone had already seconded my close vote. Not knowing that a clarification and an edit from OP showed that the question is not a duplicate, that someone never revoked one's vote. What should we do in this case? Can we somehow notify the person who voted to reconsider his decision? Was that someone already notified but decided to leave the vote as is?
The question in question.