[Not Answered]Why is this script not respecting the min range?

torso = script.Parent.Torso
maxrange = 70
minrange = 20
target = nil
tor = nil

function findNearestTarget()
	plrs = game.Players:GetChildren()
	for i, plr in ipairs(plrs) do
		if plr.Character ~= nil then
			if plr.Character:findFirstChild("Humanoid") and plr.Character.Humanoid.Health>0 then
				tor = plr.Character.Torso
				if target == nil then
					if ((torso.Position - tor.Position).magnitude <= maxrange) and ((torso.Position - tor.Position).magnitude >= minrange)  then
						target = plr.Character
					end
				end
			end
		end
	end
end

while true do
	wait(.1)
	findNearestTarget()
	if target ~= nil then
		script.Parent.Zombie.WalkToPoint = Vector3.new(tor.Position.X,0,tor.Position.Z)
		script.Parent.Torso.BodyPosition.position = Vector3.new(0,tor.Position.Y,0)
	end
end

So what im trying to do is a Zephir styled enemie (from the minecraft mod aether) that flies around and if you get to close to him, he starts following you. So i have seted the maxrange and the minrange, if the monster is less then 70 studs away to the caracter, he will follow you. But if hes 20 studs away from you, he will stop. Well this is working perfectly, but the mob keeps following you even if hes less then 20 studs away from you. Can someone please fix this?

bumpity bump