Touch screen machines cannot be trusted at all if there is no paper record of the vote. Their programming can show a proper result even as a different vote is actually recorded. It all depends on the techie who programmed it. The “wrong” votes showing up on the screen are oversights or less than complete competence on the part of the programmer.
Ours have a paper ballot on the right under a piece of glass. You can actually watch it being printed. I think they are in case of a recount but are also proof that the machine is tabulating your vote correctly.