Just because they are on the voter rolls does not mean that name is casting a vote.
I ran for a county office in WV. I did a mass voting using the mailing labels purchased from the county clerk’s office. Out of the registered voters over ten percent of the mailings were returned because they were undeliverable. The county clerk passed on using the returned mailings to review the voters’ list. They said they’d change them when they got a change of address.
At least one person a few years ago found out he had already voted when he went to the polls!!!!!