Date and time for a new LAST position

[routeconverter]

So although the car was moving east into the garage slowly, the new point was added to the west

New positions are typically added in the center of the displayed map.

and the time was incremented by double the time of the prior two points.

And that was ok if you look at the distance and the time interval of the two preceeding positions?

Hope that helps you.

Not really... you've lost me somewhere after "It was easy,..."