I have created three routes in Basecamp all around 300 miles. When transferred to my Nav V and viewed from within Basecamp, all looks fine/exactly the same but when I look at the route on Trip Planner on the Nav V the distances all increase by about 15-20 miles but as far as I can tell, the route looks the same. Is this normal or is the Nav V adding something in? Maps and settings/avoidances are consistent. It may be that I've just never noticed it before but I know the time can change but didn't think distance would. Any help appreciated.