i think there are some bugs or problems with the contrained group. the contrained group is when cloth sticks on the surface correct?

well somtimes the mesh(cloth) explodes. or vertices jump out. the ones who were selected as contrained groups.

 

 

i also tryed a shirt that is very close to the skin to select as a contrained group. the whole shirt. so in away it would act like a confroming cloth correct? well sometimes it doesnt work and poser crashes.