Well, I grabed a Dynamic Cloth, and put it on a girl, I constrained the critical areas, but the Attaced sample shows the clothing oddly pops up around the arms every now and then.

I have all the arms set so they won't collide with the clothing. I tried a simple clothing piece so I could test it. For the most part. it works fine, holds the shape and movement, except for the sample. and it mostly happens on the left arm.

Surely if you work with Dynamic Cloth this has happened. And if not, Then maybe I have some bad Cloth.