Road trip markers in Odometer History not quite right

My expectation is that the Road Trips would display like the most right one in the image below. It appears that the Road Trips do not highlight all the miles in the road trip, only the end of the first day. The two trips on the left were each a day long, and the one on the right was two days long, yet the mileage covered during each day is not highlighted. Any I doing something wrong, or would this be a feature request to change this?