It looks as though the WW2 conversion process has added actors to make the hip conform to leg movements, which you don't want to happen if it's going to be clothified (because the conforming and the dynamic elements will add on to each other). I'm not familiar enough with WW2 to know if there's an option to stop that happening, but there may well be one. You got it figured out in any case, but if anyone else is interested it's worth asking in PhilC's WW forum. He may not see this thread. Those who are comfortable with hacking CR2s can always remove the leg conformers afterwards, of course.