Anyone? I think I know why it's doing it, but wonder if there is any better way of doing it?
Under usage Limits:
Force hierarchy beyond a straight-line distance of 50 miles
(If the straight-line distance between any two stops is greater than the limit shown here, the analysis uses hierarchy, even if useHierarchy is set to false.)
If I understand correctly, for long routes (nationwide) it will default to major highways matrix and there is no way to fix this. But it's simply wrong, no other routing like Google/Bing doing this..