Hi, Sorry to say that you've got several sections of duplicated highway here, one highway mapped directly atop another highway. This would disrupt highway routing and doesn't conform to OSM practice.

The way to map this situation of multiple trails with sections duplicated is by route relations. The underlying single trail/track is mapped. Then sectioned up so that each named route can be mapped using it's own sections of the underlying trail/track. Thus no section of trail is a duplication. Please see here:- https://wiki.openstreetmap.org/wiki/Relation:route#Multiple_routes_sharing_the_same_ways

These duplications should be removed/corrected. If you need help please just ask.

Regards Bernard.