It's just a mistake from working fast. They watch the footage and occasionally type what they 'recall' was said and are working so fast that they either don't know they typed the wrong thing or don't take the time to go back to check, because they get paid shit. A lot of it is also d done remote now, so any distraction while at home could cause them to get a few lines wrong.

The person doing quality assurance also thinks it's close enough and not worth the time to edit the file.