Quite understandable that there is confusion. When editing the guide I had trouble working out where the two climbs crossed.
The original description for poxbow (as included in the guide) is to start 6m left of Oxbow, up 10m and right onto arete. Traverse right under bulge on monster jug then up.
Now for Soxglo you start 2m left of Oxbow, that is 4m right of Poxbow. Soxglo goes up then diagonally left, crossing Poxbow. ie Poxbow starts left and finishes rioht, soxglow starts right and finishes left.
There are any number of variants/combinations for the two climbs and it doesn't make sense to cross over the climbs. I start at the one point about 6m L of oxbow. I go up the buttress to crack then either right to ring bolt and finish as for Poxbow Gr 17 or I continue straight up corner/arete then right at scooped out section, about Gr 16. One good variant is to go up Poxbow to roof then traverse left under roof then finish up Soxglo (grade 20 approx) and another good variant is to pull straight up steep section above scooped out section at top of Soxglo, also about grade 20. There is another variant start in the Oxbow chimney that goes at about 20.