Position of body that lightning comes out of

no not that position. =P

Anyhow, that i've noticed with my dummy caster (that casts forked lightning).. is that the position the lightning comes out doesn't match up with the position of the real unit that the dummy caster is standing on.. it's too high up.
how might i change this?

I think you can change the attachment point for the ability animation, here are the attachment points for models: origin (which is below the feet, you probably want this), chest, head, weapon, hand, left, hand, right ... don't know if that will work, but that's what I'd try first

Actually, if you look in the "Art" fields for the unit in the object editor, there should be several X, Y, and Z coordinates for the point from which projectiles originate on the unit.