So you really don't KNOW who you cast your vote.
1/ I get questions frequently from people who have heard the SOS say that the BMD QR code ballots can be audited to tell who won. I'll explain why he is wrong.
Your BMD ballot vote is stored in the barcode. The text doesn't count. The computer reads only the QR code.

So you really don't KNOW who you cast your vote.
--every voter thoroughly and accurately checks before scanning to be sure that the printed list reflects his choices. (Hard to do, to remember all the contests), AND
--there is a thorough post election audit.
If you pressed the screen for candidate Sam, but the printout & QR code said "Mary," and you didn't check, then your Mary vote was not intended.
Most of us would never notice on our grocery receipt that it was $.45 more and said "organic."

The store's official records are for organic milk because the barcode was miscoded.

But your receipt could be wrong too. The barcode could be for organic milk, but the receipt may say regular milk in the text.
The official record (your vote) was for organic milk! (Which you hate!)