There is a simple way to tell if she is telling the truth or making this al up. Just go get all the ballots and inspect them and recount them. If the same ballots were scanned multiple times it will show up in the recount.
This is why I keep saying paper ballots must be eliminated completely. We need a system where the voter inputs his vote and it is tabulated electronically immediately. There was no middle men.
Such a system can be built and must be built. In fact, I would go so far as to argue that the system should eliminate absentee ballots as well since people should be able to vote on electronic devices.
What would it take? It would take an id that stores a encryption key. The ID would be provided by the government after voters provide proof of identity and citizenship.
My system will give the results of an election as soon as the "polls" close.
Some people don't trust computers and worry they could be hacked, but we move money all around the world by the trillions every day on computers. It can be done if we are willing to do what it takes to get it done.