I have found a couple of routing oddities. MapFactor free keeps trying to bounce me on and off the interstate in preference for surface roads. (I can provide specific examples if required.)
I cannot see much wrong with these routes, both are going through US26 it could be incorrectly set vehicle profile - to get back to default close Navigator and delete file vehicle_profiles.xml
The app wants to take me off at exit 256A just to bring me straight back on the interstate after slowing down from 60, coming to a halt at traffic lights, then putting me back on the same road.