Okay, scattering means that the parasites run, they run for their life!
This happens when you ingest a dose that doesn't manage to kill them, but is large enough to "scare" them away. This is why it's not good to experiment on your own with herbs, but rather have some sort of supervision.
As far as the saturation goes, yes the body is suppose to get saturated during a parasite cleanse, but I actually wonder whether that can happen?