I have problems with clothing not doing what I want it to, but I don't think it's a problem with the people designing the clothes. Clothes always lose their scaling, at least for me, when I move the figure. Also, no piece of clothing ever fits perfectly in every pose, and always needs a tweak. I don't know if there is a proper way to deal with these problems, being a beginner, but my way of dealing with it is by getting the poses right before applying clothing.