It was most likely a lone gate to block cars, which appears to have been removed at some point. Given the age of this changeset, I'd just go with the Mapillary photos and remove the nodes.

(Plus, it's been 11 years and the trails might have changed--it wouldn't hurt to survey them again.)

It means they need further surveying--I surveyed parts of some trails, but others were based on Bing and/or a rough estimate based on my survey.

Okay, those fixmes I added were just confusing, so I've removed them.

(I was trying to indicate that those buildings have addresses from 500 to 510, but I don't know which address goes with which building.)

Unfortunately I don't remember why I removed the tags. Maybe I was trying to replace that way with a multipolygon, but I forgot to add the multipolygon.