I believe that this is probably a bug, although I am not sure. When I go to my flag-summary page, I am able to see links for questions that I have flagged that have since been deleted. If I click the link, I am directed to the 404 page, as I should be; however, I am still able to see the vote tally for the post from my flag-summary page. I believe this to be a bug.
The question shown here has been deleted. I think that I should not be able to see the vote tally.