I have found similar results to you. I used the same dataset you linked in your post. I checked everyone I know that voted in person and it does not show they voted for this election. Perhaps the dataset was downloaded too early. I did check one person that voted by mail. This person shows as voting on Nov 3. I guess this makes sense since the ballots were only supposed to be counted on Nov 3. For reference, people can pay to download the voter info here:(https://www.pavoterservices.pa.gov/pages/purchasepafullvoterexport.aspx). I assume that is where the original data set came from. This page mentions that it is up to date for Nov 9 and will be refreshed Nov 16.