Now regarding the apparent size of the leaf shadows:

It's clear to me they're doing exactly what they're supposed to. The reason the leaf shapes are stretched out on the figure is because her skin surfaces are nearly vertical.

Put a flat box right above her shoulder and render again to see how small the projected shadows really are. Then progressively tilt that to be more vertical and render again.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)