If the souls of the original Ancients who sacrificed themselves to summon Zodiark were still present within Zodiark, were the souls of all the other Sundered people collected within Zodiark with each Rejoining? If Emet-Selch had been successful in killing all humanoid life on Norvrandt, wouldn't those souls have joined with the ones inside Zodiark?

Or, were the souls within Zodiark un-Sundered as they died before the Sundering?