The information on this website is based on the sources listed on the Credits page. However, those sources have proven to be inconsistent from season to season, game to game, or even section to section in the same publication. Some have been left as is for many seasons, and if they are eventually corrected, an official announcement is extremely rare.
Once the data has been obtained (and corrected if possible), every effort is taken to ensure a higher level of accuracy by using database or website code to perform calculations on a single data source. Unfortunately, that sometimes leads to more inconsistencies with the latest publications, but not enough time, resources, or assistance to research and fix each and every one.
Note: Some issues are being tracked on this Trello board.