I'm trying to get that fixed with a State Rec Area in northern Michigan. Trailforks was drawn, years ago, with the old/unofficial/local names of a bunch of bandit trails. Since then the state has closed a couple trails, officially recognized others, names have become standardized, and an official map has been developed.
Now Trailforks doesn't match the official map nor the on-the-ground signage. But the level of change needed is beyond what a normal user can do, and I'm struggling to get an admin to make the changes. In the mean time, when I was there a couple weeks ago I helped three separate groups that were profoundly lost because they thought they were in one place (per Trailforks) but none of the signage matched what they thought. It was the whole bad-data-is-worse-than-no-data problem.
If you want to see this for yourself, compare these two:
https://www.trailforks.com/region/harlow-lake/
https://www2.dnr.state.mi.us/publications/pdfs/RecreationCam...