I recently went on a few trips this summer. The same trips were taken again. I set the ones I frequent often as my favorites. The learning function was set to "ON". When I made the same trip again the GPS Routes me a different way.....It's not learning the way I normaly go. Any Ideas or suggestions?. I also shut road conditions "Off" and they still pop up during my route if theres traffic. Don't understand why. I also Owned several other Pioneer navigation units in the past. This unit the Avic-Z150BH hast trip route: Fast, Short, & Main road. My other radios did not have Main Road......is this what I should select?