Close votes age as follows:
Close votes age away harmlessly after 4 days if the threshold is not reached. Each new close vote resets the timer, and close votes only start expiring if the question has had 100 views.
I know that users can retract their close votes for questions (Can we have the ability to retract a close vote before it closes? is status-completed). If a user retracts a close vote on a question, can they then recast a close vote on the same question?
If so, does retracting and then immediately recasting a close vote on a question reset close vote aging? If it does, this is a bug.