Lua What's wrong with this script?

[ziggy46802]

local combat = createCombatObject()
setCombatParam(combat, COMBAT_PARAM_BLOCKARMOR, 1)
setCombatParam(combat, COMBAT_PARAM_BLOCKSHIELD, 1)
setCombatParam(combat, COMBAT_PARAM_TYPE, COMBAT_PHYSICALDAMAGE)
setCombatParam(combat, COMBAT_PARAM_EFFECT, CONST_ME_EXPLOSIONAREA)
setCombatParam(combat, COMBAT_PARAM_DISTANCEEFFECT, CONST_ANI_EXPLOSION)

function onGetFormulaValuesOne(cid, level, maglevel) --One is healing
	local min = doCreatureAddHealth(cid, 1)
	local max = doCreatureAddHealth(cid, 2)
	return -min, -max
end

function onGetFormulaValuesTwo(cid, level, maglevel) --Two is damage
	local min = 1
	local max = 2
	return -min, -max
end
 
setCombatCallback(combat, CALLBACK_PARAM_LEVELMAGICVALUE, "onGetFormulaValuesOne") --healing
 
 
setCombatCallback(combat, CALLBACK_PARAM_LEVELMAGICVALUE, "onGetFormulaValuesTwo") --damage
 
	return doCombat(cid, combat, var)
end

It is in my weapons/scripts folder and does work, but only for damage. It is supposed to heal you 1-2 hp every time you attack, but it doesn't heal the monster or the player, how come?

 

[Summ]

You cannot add 2 callbacks of the same type.
Also, you would need to create an additional combat there.

How about just adding doCreatureAddHealth(cid, math.random(1, 2))?