@Martin-Wilcke
Thank you for the great answer. I do export as Zumo XT 1.2 and rarely have an issue. But I have now learned that have to FEW shaping points can/will cause the Zumo to look for the default selection (Fastest, Shortest, Curvy) if it doesn't have another shaping point close enough to the last.
I'm still unclear on the value of export Route as a Track. Even after Serg's video I'm not sure what I am gaining. vs export to 1.2