1. CenTexDodger, thanks for the info. I tried it out, and it works.
2. imajeep: This problem only occurs when I am entering the route in the GPS. MapSource works just like you mention, but my PC is not always available, so I was trying to experiment on the GPS.
I ran into this issue because I am currently in the US and I was trying to enter some routes in Europe, which obviously created a calculation error. I am surprised that there is not a more obvious/user-friendly solution. I think a check box stating whether or not you want to start from the current location would be better.
Thanks for your replies.