The points per SW seems a little screwy too. The top three ponies in the given example have all won two SWs, but only the top 2 have 12 points. Third pony only has 6. Are points based on the grade of the SW?
ET: It looks like ranking is based on # of SW points, then # SP points, and finally # OA wins rather than the number of points total. If that is indeed the case, the ranking makes sense.