Check the nap on the fleece attached to the skirts. If it has the least resistance when moving your hand from front to back, this might explain why the pads are crawling. Conformation can cause it as well. Try reversing how you put the pads on the horse. Try using just the wool pad. I think the thinlines are synthetic.
Thanks Saddlebag..well the mare is not right..her pelvis is tilted and her entire left side is off..she has been compensating using her right side..she is also a little butt high but not too bad. Just so you know she is being seen by a chiro/acupunture equine vet.
Not really sure what you mean about the fleece and resistence. Thank you