diff --git a/mobf/spawning.lua b/mobf/spawning.lua
index c9fc40f..5a27922 100644
--- a/mobf/spawning.lua
+++ b/mobf/spawning.lua
@@ -642,7 +642,7 @@ function spawning.register_spawner_entity(mobname,secondary_mobname,spawndata,en
 			on_step = function(self,dtime)
 				self.spawner_time_passed = self.spawner_time_passed -dtime
 
-				
+				--self.spawner_time_passed has to be handled by spawnfunc!
 				if self.spawner_time_passed < 0 then
 					local starttime = mobf_get_time_ms()
 					
@@ -666,11 +666,13 @@ function spawning.register_spawner_entity(mobname,secondary_mobname,spawndata,en
 				if self.spawner_mob_transform == nil then
 					self.spawner_mob_transform = ""
 				end
+				--TODO honor time since deactivation
+				self.spawner_time_passed     = 1
 			end,
 			
-			spawner_mob_name 		= mobname,
-			spawner_mob_transform 	= secondary_mobname,
-			spawner_time_passed 	= 1,
+			spawner_mob_name        = mobname,
+			spawner_mob_transform   = secondary_mobname,
+			spawner_time_passed     = 1,
 			spawner_mob_env         = environment,
 			spawner_mob_spawndata   = spawndata,
 		})
diff --git a/mobf/weapons.lua b/mobf/weapons.lua
index 6323386..34eefcb 100644
--- a/mobf/weapons.lua
+++ b/mobf/weapons.lua
@@ -43,6 +43,8 @@ end
 -------------------------------------------------------------------------------
 function mobf_do_area_damage(pos,immune,damage_groups,range)
 	--damage objects within inner blast radius
+	mobf_assert_backtrace(type(range) ~= "table")
+
 	objs = minetest.env:get_objects_inside_radius(pos, range)
 	for k, obj in pairs(objs) do
 
@@ -298,10 +300,10 @@ function MOBF_PLASMABALL_ENTITY.on_step(self, dtime)
 
 	if hit then
 		--damage objects within inner blast radius
-		mobf_do_area_damage(pos,self.owner,self.damage_range/4,self.damage)
+		mobf_do_area_damage(pos,self.owner,self.damage,self.damage_range/4)
 
 		--damage all objects within blast radius
-		mobf_do_area_damage(pos,self.owner,self.damage_range/2,self.damage)
+		mobf_do_area_damage(pos,self.owner,self.damage,self.damage_range/2)
 	end
 
 	-- vanish when hitting a node