Struggling with Locus Map Web

[GusGF]

I have a cycle route (see gpx attached). In edit mode I added a route point (via) to the route simply to notify me of a control in case I cycled past it. Is it the case one can only see these (shaping & via) points in edit mode? Because outside of edit mode I can't see them in the web app.

Everytime I add a route point it creates an additional point e.g. If i add a route point between 6 & 7 (see screenshot), 7 becomes 9, 7 becomes the new route point, and an additional route point 8 (shaping) is created which appears in the left hand pane but not on the map. And an error message appears under point 7:
Sorry, route calculation failed. Please try it again or move points closer to the paths.

If I then delete point 8 the error goes away, and the route points are as they should be.

[GusGF]

See below screenshots when a route point is added the error that's generated and what happens when the invisible route point is deleted.

[GusGF]

Just found when adding route points to the existing route (and I was very careful to place the route point on the existing route line, icon changes from a crosshair to a pin) it decides to change the route. I just noticed this, when adding a subsequent point a straight line suddenly appeared momentarily and I noticed the previous section of the route changed!!

It seems this webapp is proving to have very limited use. Would appreciate some support here.