"You have already voted to close" -- question was reopened

Question

https://stackoverflow.com/q/7475221/561731 was closed due it not being a real question.

Now it was reopened and it is a duplicate. So, as usual, I click on close but I get this dialog:

Hmmmmm… This is odd; I voted to have it closed before, but that was something completely different.

Should I not be able to vote to close for completely different reasons (or even for the same reason if the opinion stands?) since the question has now been reopened?

---

This has been discussed previously on Please allow expired close/open votes to be re-cast and Bogus "You have already voted to close this question" on expired votes.

Answer 1

This restriction exists because when it didn't exist folks would get into "close-wars", wherein the same sets of users would repeatedly re-open and re-close controversial questions. Yes, it does break use-cases where questions must be closed repeatedly. Fortunately, those are less common.

When you find a question that you've already voted on in need of some closin', flag for a moderator. Resolving these situations is their bread-and-butter^*.

Note that the expired vote scenario you link to is a little bit different (and a much more recent change to the closing system). Though again, the idea is that if you can't get a resolution by normal voting, the solution is to escalate it to the moderators, not keep voting impotently in hope that something will change.

^{*_{Ok, so mods don't get paid, so this is strictly non-nutritional fake imitation bread and non-dairy butter.}}