In the 10K tools "Delete votes" page, posts that you cannot vote to delete/undelete are grayed out but shown for the sake of consistency. I'd like it if there were something similar for posts you've already voted to delete. Often I click on a question that has 2 delete votes, decide if I should del-vote, and then find I've already voted to delete it.
So, can we add something to indicate that you've already voted to delete a post from that page? Maybe just gray it out, but change the tooltip to "You have already voted to delete this post"? This should also apply to posts you've already voted to close.