Check your characters hip rotation. I found some really wierd results that absolutely mangled the clothing mesh, but when I adjusted the hip rotation of the character by 1 or 2 degrees in either direction, it went back to normal. So it might not be the cloth at all, it could be the pose.

no rotation applied, legs brought back a little and in a little. whenever its a side to side motion its doing this wierd bending :/ i fought with it for over 2 hours now, giving up for the night

Your mesh isn't symmetrical. Look under the waistband, center front and shift your eyes a thumb's width left (about a half-dozen polys). There is a weird little triangle in there. It is possible that there are a couple of other irregularities, too, and that movement is being displaced or transferred differently on each side of the body even though the joints are being moved to the same degree. My main critique is that it is skin tight through the crotch. Most of our underwear doesn't fit that snugly! I pity her if a zipper is involved. Carolly

Ok, need some info. ;) What bodyparts does it consist of - represented by actual polygons and "ghosted" ones? Did you build the cr2 from scratch, via a utility or plugged into another cr2?

Can you do a screen shot with just one leg posed and the joint parameters showing?

its for the mil kids, its using the same joint parameters as the mil girl preteen pants, noticed that one bends a little funky too but its baggy enough you can't tell

OK... need a little more than you are giving me but try increasing the size of the spherical fall off zones by 1% or 2%

sent ya a im with the cr2 + obj philc