This question already has an answer here:
Earlier today I voted to reopen a question, but on further consideration decided that it should remain closed. Since we can now retract close votes, I tried to retract the reopen vote by clicking on the "reopen" link, but instead I just got the "vote to reopen?" dialogue. (I didn't try clicking "ok"; I assume that had I done so I would have been told I've already voted.)
Is this expected behavior -- we can retract close votes but not reopen votes?