After a 6 year brawl, Billy Mitchell is back in the record books even though Twin Galaxies 'had all our ducks in a row' for a courtroom showdown

pcgamer.com:

Almost exactly six years after being stricken from the record by the scorekeepers at Twin Galaxies, Billy Mitchell's Donkey Kong's scores are back in the (historical) books. In a statement released Tuesday, Twin Galaxies announced that it was restoring all of Mitchell's scores to its official historical database but not, mind you, its modern leaderboards.

Mitchell was originally booted off of Twin Galaxies' record books after a member of its forums named Xelnia—real name Jeremy Young—posted a thread disputing that Mitchell had attained his scores on original, unmodified hardware. Young alleged that Mitchell had actually gotten his scores via arcade emulator MAME, making them invalid for inclusion in the arcade category. 

Following «an independent investigation by Twin Galaxies, supported by a series of detailed submissions, experiments, and analyses,» Mitchell's scores were yanked from both Twin Galaxies' records and the Guinness World Records, although he was reinstated into the latter back in 2020.

Mitchell has campaigned against his exclusion ever since, and a new submission appears to have convinced Twin Galaxies to finally reach a compromise. In its statement, Twin Galaxies says that a submission on behalf of Mitchell by Dr Michael Zyda has convincingly demonstrated that the anomalies originally pointed out by Young in 2018 could actually occur on unmodified Donkey Kong arcade hardware «if the hardware involved was malfunctioning likely due to degradation of components.» You can find Zyda's full submission here.

«In fair consideration of the expert opinion provided by Dr. Zyda on behalf of Mr. Mitchell,» says Twin Galaxies, «and consistent with Twin Galaxies' dedication to the meticulous documentation and preservation of video game score history, Twin Galaxies shall heretofore reinstate all of Mr Mitchell’s scores as part of the official historical database on Twin Galaxies’ website.» It has also archived and "[removed] from display" the original forum thread