Conformers make the clothing match the figures rigging , the skelton and joints are identical in both.  To make the figure look better when bent the deleopers added magnets to morph the figure slightly. Magnetise pose s4ets these magnets to affect the clothing as well as the figure, so with clothing conformed and magnetised it should bend exactly the same as the figure.

 

This only applies to the V4, m4 figures. V3 did not have magnets, they used joint controlled morphs.

 

Pokethrough happens when the figure and the clothing do not deform identically, and that can be caused by the obj mesh itself.