Just a thought, but what if the changes to the stage of your wither came with something like +10 Evil/Chaotic points? Conversely remedies would be +10 Lawful/Good.
This seems erratic and not necessarily true. A person that is withered is still in control of their actions until they are completely undead and under the spell of H'bala. Becoming withered does not necessarily make you evil, and acquiring a cure does not make you good.
One example of this can be seen through a cure that can be acquired at Murdertown...