When an account is banned, the units of evil associated with its IP increases, would those units added to the IP be reduced if the ban is reversed?
NO, AFAIK when the ban is lifted from the account by paying the fees or adding the account manually to whitelist, the change occurs at the account level and not the IP address. Meaning that even if you paid the fees or were whitelisted manually and logged in with the same previous IP, you will be banned again if it has high evil points.
If this is true, the order will apply to banning signatures from permanent to temporary.