Thanks for posting the map. In general, I can see that the difference was not the route, but the execution. I had the same skip, and followed the same line with only four fairly minor exceptions. On 12 I stayed on the trail a little longer and missed to the right, recovering at the marsh. On 16 I got confused in the marshes and drifted right all the way to #8 before recovering. On 20 I was a line higher, making sure I went by the big rock on the south side of the hilltop for security. On 24 I hopped off the trail maybe 30 m. sooner, just at the edge of the knoll top on the trail. I even missed 21 the same way you did.