If you’re having problems selecting a point where different sections of the route overlap, you can use the Reshape Section tool (with the Auto-Plot switch turned off) to separate the overlapping sections slightly so that you can select the correct one.
We're hoping to be able to add a new tool to make it easier to separate overlapping sections of a route at some point - it's on our Feature Requests list (number 12), so if anyone would like to see us develop this, please vote for it on our Feature Requests page.
On an out and back route if I want to add a direction on the out section it is impossible. It always wants to add it to the return leg.
I guess it is because it can't determine which of the two lines I am on as they overlap each other.
If I could edit the distance in the direction it would fix the problem.