This is the official .GPX file of the CAI (Italian Alpine Club), the organization that maintains the trail and physically draws the symbols on the ground:
https://trailsfvg.42web.io/GC/MxGpxView.html?fileGpx=605%202022T-V1.gpx

If you also set the "waymarked trails" layer, you can see your biggest variation: the one that starts at 800 meters and reaches 900 meters.
Passes on a forest road that exists, but it is not the official CAI trail.

I'll try to ask the CAI for confirmation.

Your other minor variations could be valid, I haven't checked them.
