I upgraded my Nuvi 1490 several months back and BC routes uploaded to the Nuvi 3597 were the same route on both. I think this is referred to as not recalculating the route but I don't the tern is technically correct. What ever the term, I was a very happy camper. Being able to upload a route to the 3597 with our regard to the routing preferences on the Nuvi and get the same route was great. When I went to Trip Planner to get the route the first time, it took several seconds for the route to appear but life was good because I got the same route.
After updating BC and possibly Firmware on the Nuvi, the uploaded routes are pretty much useless. For example, a route with two waypoints inserted to shape the route is 131 miles. I created the route the normal way and it Trip Planner and upload both routes. The two routes give the same results when uploaded. They show 164 miles, the route is going to the shaping waypoints and back tracking to the route. If I am at the starting location and tap go, I am asked to select my first designation, if I select the first shaping waypoint (inserted, not a drag), I get the 164 mile route. If I select the true destination, I get a 130 mile route with the shaping waypoints ignored. This makes the 3597 useless for routing as I can no longer try to match preferences and get the same route. Is there a way to fix the problem.