I tried scoping some meshes. I had an actual success.
However, the other meshes, while the pieces look dead on target in Nifscope, are floating around in Charactertool and the game. I copied the branch, then pasted the branch to the "head" node in all of them (including the one success). All were positioned around the mesh when I copied them, and I moved them with "edit".
Try deleting the "NiSkinInstance" from the piece after you paste it on.
That seems to work. Thanks!