I don't understand people who decry the touchscreen voting machines as unrealiable and too easy to tamper with, then turn around and say they'd rather use a paper punch or scantron system. ALL of those systems are fed through computers. ALL are capable of being tampered with at the database level. If anything, the older versions are easier to tamper with because you believe your vote is being recorded the way you wanted, but the sheet of paper with your vote on it is no longer in your possession.
And do you REALLY think that if someone was rigging the machines they'd SHOW your vote being changed?? Please.. Why show the changed vote when you can have the person press the vote they want (or punch, or fill-in, btw) and then record the vote as the choice you want? It's moronic to have it change the vote on the screen where it would get someone's attention.
No, what's happening here is that some nose-picking moron put their slime-covered finger on the screen, leaving a damp print behind. Or the attendants used too much cleaning solution to clean the screen, leaving some water at the edges. The end result is that the next person who touches the screen get their print averaged with the wet print and the computer thinks they're touching the screen somewhere between. If you've ever used your touch-screen phone with wet fingers, you know how it can screw up the screen response.
The idea that there is some conspiracy that's programmed the machines to change the vote on the screen is utterly laughable.