I have a route of approximately 40 miles away from home. When I start the navigation from the beginning of the route the total journey then becomes 100 miles which is good because the start point is 60 miles from home.
However, there is a fuel stop in a small one-way system on the way to the start of the route and if I add this point in the route is recalculated again to be about 170 miles. The additional distance to go round the one-way system to get to the fuel stop and then continue navigating to the start of the route should only add around 0.5 miles not 70 miles. What's going on?