Mafia doesn't seem to understand that Zombie Maestro reduces the cost of zombie skills by 1 (to a minimum of 1), which can sometimes mess up automation because it thinks you have 0 zombies instead of 1.
KoL can't handle Zombie Maestro correctly yet, so mafia doesn't bother to account for it. (1 cast of Aggravation goes from 3 to 2 horde, but 10 casts goes from 30 to 29. 2 casts of Chow costs 1 horde total. Optimal casting of stuff is a mess.)