CurlingMan13
I took a look at the roads to see if there was anything erroneous standing out.  This seems to be an issue with the GPS routing algorithm.  There are no speed limits listed so that can't be used.  Whatever algorithm the Navmii GPS uses needs some tweaking (maybe prefer roads with more lanes?).

There are no turn restrictions that might need to be added or that should be added.

I recommend contacting Navmii GPS and closing out this note.