Is there any way to change how my 235 records distance when there is elevation involved. On a recent run/walk my Garmin recorded 8.7km, my partner's 9km and everybody else between 11.1km and 11.7km, which were correct. The elevation was in excess of 600m so I assume our watches were picking up point to point not the actual distance covered. It's a bit frustrating and it would be good if it was something we could change, can anyone help?