I have identified the source of the many last minute hot roast beef sandwich votes.
It was Karen, following the advice of the old Chicago political machine to vote early (not really) and often. She spent her last moments at work on Friday either sneaking onto idle computers or convincing her co-workers to vote for the hot roast beef. I don't she registered any dead people to vote, but you never know.
She will pay for her fraudulent vote manipulation by eating a turkey club tonight! Ha!