The audit found that the ballots had been folded "incorrectly" (Is there a right way to fold the ballots?) and if the crease went through the mark for a candida

The audit found that the ballots had been folded "incorrectly" (Is there a right way to fold the ballots?) and if the crease went through the mark for a candidate, it would count the crease as a mark. This meant if the voter had marked another candidate, it would think it was double voted and not count it, and if they had not marked a candidate, it would count it as a vote. I am not sure having the source code of the machines be open source would help, but maybe make it easier to audit and detect that the crease would lead to a miscounted ballot.