you should really drop the inner outlines or try colouring them (inner and outer), just shade them like you would the rest of the character, except a shade darker, as they stand they are really counter productive in showing the volumes of the character. If you MUST keep the outlines, be consistent and do the headband.
As for this last pose, what's he doing? looks like he could be leaning against a wall, in which case the headband is in the wall and his centre of balance is completely wrong. In any case (his) left leg is too long and out of perspective.
And I'm gonna make the same suggestion that's been hinted at in a few edits, drop the highlight shade, its just noisy and not helping the readability at all.