Sounds like your GPS just wants you to have the most interesting trip!
My wife and I refer to the GPS as Sybil, a nickname we gave after one we used in Chicago kept taking us into dead-ends and up wrong-way streets until we became skilled at interpreting her prophecies...as Heraclitus described an ancient Sybil:
The Sibyl, with frenzied mouth uttering things not to be laughed at, unadorned and unperfumed, yet reaches to a thousand years with her voice by aid of the god.
Enjoy the rest of your trip...and when you have time, post a report here!