Deformation

Hi, I have some problem with deformation. On attached screens left hand is right deformed, but the right hand (with is identical) have some distorts. This happens often, i don’t understand why?

If you’re using elliptic influence, is the zone of influence wide enough to cover
the entire width of the arm?

I notice that the ending of the deformation ending near the hands has a different
position between the two drawings so perhaps the resting position is slightly
different between the two?