A related bug/hack/abuse is that 

> one reviewer can repeatedly vote to Leave Closed or Leave Open ( = vote to remove from queue) on the same question.   
>
It looks like this ability exists **whether or not there were edits on the question** during the time between the first and the last Leave Same vote, so the multi-votes can be on exactly the same version of the same question.

This poses the same inequality problem as Delete voting on a question one has successfully voted to Close: it creates a race condition where users who are over-involved or always online, have a way to cancel the voting abilities of others by acting quickly enough.