The article was deliberately misleading. The article says this was the result of a human adjudication by a panel of people. Which is what I described - you have representatives of both parties determining voter intent for ballots that can’t be scanned.
Here is the original ballot in question:
https://justthenews.com/sites/defaul...2_000018_0.pdf
Voter intent is clear here. If you look at every other race, the voter used check marks. And they voted Democrat everywhere. The check mark is by Biden. A scribble out is next to Trump. This is exactlyg why they do adjudication. You might call this “altering” a ballot, but really they created a new ballot and darkened the circles where the voter had check marks.