A ballot cannot just dissappear. If you signed in, there has to be a ballot attributed to you. A ballot cannot be counted incorrectly. Either the machine will get fixed and recount all the ballots and/or there will be a hand count. A "spoiled" ballot must be replaced by a good ballot. The normal number of spoiled ballots is tiny, so if someone tried spoil a bunch of ballots and replace them it would be obvious. I think there are also safe gaurds depending on your precinct... And no one is going to risk going to jail over a handful of votes. Voting in person, with ID is relatively secure. Its the unsolicited mail-in ballots you should be worried about.
What is keeping them from switching out the ballots? Or at the very least marking another spot on the ballot which would essentially void the ballot?
They shouldn't just take your ballot. It should go into a secure box to be counted later.
This is what happened, but who is to say that it will be counted correctly when they open it back up?
What’s to stop them for swapping it with another ballot, or tampering with it to make the ballot invalid?
A ballot cannot just dissappear. If you signed in, there has to be a ballot attributed to you. A ballot cannot be counted incorrectly. Either the machine will get fixed and recount all the ballots and/or there will be a hand count. A "spoiled" ballot must be replaced by a good ballot. The normal number of spoiled ballots is tiny, so if someone tried spoil a bunch of ballots and replace them it would be obvious. I think there are also safe gaurds depending on your precinct... And no one is going to risk going to jail over a handful of votes. Voting in person, with ID is relatively secure. Its the unsolicited mail-in ballots you should be worried about.