2012 Voting Machines Altering Votes

My wife and I went to the voting booths this morning before work. There were 4 older ladies running the show and 3 voting booths that are similar to a science fair project in how they fold up. They had an oval VOTE logo on top center and a cartridge slot on the left that the volunteers used to start your ballot. I initially selected Obama but Romney was highlighted. I assumed it was being picky so I deselected Romney and tried Obama again, this time more carefully, and still got Romney. Being a softw