I vaguely remember "accidental" changes via Bungie that were eventually acknowledged by them and then never corrected. (Winters Run reset, Myhoclast 50% nerf rather than 34%)
Let's be honest math is never this companie's strong suit. They still couldn't code to count kills on yellow minions towards grimoire , and certain ultras don't count as ultras like Omnigul and the Psion Flayers.
I have no idea how to code but there's a theme with certain pieces of coding their team is God awful with.