I have been having 2 intermittent problems which I think are related.

When I have uploaded a recorded route from the Satmap to my computer, I delete the route on the Satmap. But the next time I want to upload a route I find the cancelled route still present. I delete it again and then it is gone for good.
It is odd because I have checked the deletion by switching the Satmap off and then on after deletion, and I find it has indeed gone, only to find it is back when I have walked another route!

A bigger problem is that sometimes when I am recording my route I find the snail track is a straight line going back to a previous walk! This is despite using 'Reset All' before pressing start.

I think the solution may be to use Reset All before deleting the routes and I am going to try this.

However, if anyone else has had these problems and found a solution I would be interested to know about it.