Billy Mitchell's scores and records have been removed from Twin Galaxies' database.
The dispute decision from Twin Galaxies:
https://www.twingalaxies.com/feed_details.php/1047/billy-mitchells-donkey-kong-and-all-other-records-removed
Billy's response:
http://www.ign.com/articles/2018/04/16/billy-mitchell-responds-to-having-donkey-kong-pac-man-records-stripped
Omnigamer's summary of the evidence:
https://www.youtube.com/watch?v=SEKYlZbaQPE