3ds Max: shag hair glitch

I was wondering if anyone knows why shag hair sometimes causes hair to stick out of non selected mesh even when a material ID is given to certain faces and assigned in the shag emmitter properties. every time I try to add hair to my char shag causes lots of random hair to apear in unselected mesh when I have a certain selected mesh to emit the hair


Any comments or ideas would be appretaited (sp)