It really doesn't take a rocket scientist. I've been saying the computer count can be programmed for 25+ years. Now they've got us voting by mail in Washington State, and many ballots will not be counted at all because so many people don't read the new special instructions before marking them!
This puts me in mind of the gasoline price chicanery that happened around here a few years ago. Most of the pumps now are electronically controlled from a terminal in the store and a program circulated that allowed the prices to be altered progressively. The first 5 gallons was priced properly due to all the folks with 5 gallon outboard motor gas tanks who would be instantly aware when they put 6.5 gallons in their cans. Above 5 gallons the program can be set to deliver progressively smaller gallons. The beauty of it was that when the state guy drove up the clerk merely had to punch F12 or DEL and the pumps were instantly reset to be legal. I got so I bought no more than 5 gallons at a time or went to one of the few stations that still had mechanical readouts. That stuff went on for most of a year until the large number of people involved became its undoing as too many clerks and managers had too many beers and bragged. The perps were all stuck with $3000 fines which seems like it would be worth it. I am sure that the stations that participated made more than 3 grand on it.