Established Fact
At least hundreds of test ballots, produced during the Logic & Accuracy testing process, were included in the Recount, but were not in the initial count.
Citations
Fulton County 2020 General Election Report for Georgia State Election Board, Election Oversight Group, LLC https://drive.google.com/file/d/1UzJ4qX6iBSrFMtkoRnOGIe3q8pzGjkVx/view?usp=drive_link