If they were miscalibrated in that fashion, then the machines could not have correctly recorded the vote on the paper receipt.
- The user inputs something on the touch screen.
- The machine’s software tallies the inputs in memory.
- The machine’s software records the inputs onto the paper receipt.
If #3 is correct, then #1 is probably not the problem. (“probably” because it’s possible, although highly unlikely, that #3 could also be in error such that it also changed the inputs so that they ended up correct.)