The distance are just measured as straight line, not as optimal route. The official distance listed is 4.8km. For some reason I can't edit the originally entered leg lengths. Maybe someone else can try it.
Somehow I'm missing one of the splits, though I don't remember which control it was that I didn't punch my watch.
Hmmm... one possible explanation: I accidentally stopped the watch while sliding down the mud bank enroute to 4. So when I punch the "split" button at 4, it started the watch again. That would explain why there's a discrepancy between mine and the official time. I'll make the appropriate adjustment once the official results are posted.