weight problem?

hi! First i would select skin/body parts by hovering each part and press L to select it. Once selected, remove doubles to get rid of seams.



While this is still selected, hover your mouse over the mesh and pres P /selection to divide this part into a new mesh group. This is because you have to re do the UV_1 of the part you modified. If the ruffles is the only thing you modified then you can repeat the process and select only that to move it into a separate mesh group and follow the steps for re doing the UV_1.

After you're done with it, you can select all groups by clicking the first (shift click the rest) then hover your mouse over the mesh and press ctrl+j to join them again.

If you still have any weird issues, then you have to fix the vertex paint of the part you modified as well.