@Gary-Hargraves I often export files from basecamp and upload them to MRA route planner. They come into MRA and preserve the shaping points and waypoints (Garmin Speak) as waypoints and via points (MRA speak) perfectly and route as planned. In Basecamp check that you don't have the navigation mode set as direct.
Or for the route properties
This is the route designed in Basecamp imported into MRA