I ran several routes for our recent vacation and found the preview was only correct about half the time. The pocket query created from the routes was always accurate. Just ignore the preview and create the query, it should work fine.
I created a public route from Russellville to Branson. It should be available if you click on our profile. I ran a PQ from it and it worked fine, even though mine showed the same preview as yours.
Don't forget to change the file to .kml.
"Honey, we're not normal people. We're the Griswolds. "