Went up to Kincardin Ontario today, and about 40 minutes into the trip the unit anounces that it found a route that was shorter by 20 minutes and so I want to take it. Of course I said yes, but it makes me wonder why it didn't find it in the first place. It must be rechecking at different times along the route which is good I guess, but I am surprised that it was so far off the best route on the first calculation. Have others had this happen.