Lua addEvent Lagging

[ziggy46802]

Heres my script

local rock = 4001 --put unique id of rock here
local respawnminimum = 1 --put minimum number of minutes for rock to respawn
local respawnmaximum = 1 --put maximum number of minutes for rock to respawn
local receiveminimum = .5 --put the lowest amount of the item you want to get here
local receivemaximum = 1 --put the maximum amount of the item you want to get here
local posa = {x=1094,y=1060,z=6}

local function restore(cid, storage)
	setPlayerStorageValue(cid, rock, 1)
		doRemoveItem(getTileItemById(posa, 8638).uid)
		doCreateItem(8638, 1, posa)
		return true
end	
	
function onUse(cid, item, frompos, item2, topos)
if item.itemid == 8634 and
		 getPlayerStorageValue(cid, rock) < 2
		then	
			doRemoveItem(getTileItemById(posa, 8634).uid)
			addEvent(restore, 1000, 5000, cid)
			--setPlayerStorageValue(cid, rock, 2)
			doSendMagicEffect(getPlayerPosition(cid), 13)	
			doCreatureSay(cid, "You mined it!", TALKTYPE_ORANGE_1)
			
elseif
	getPlayerStorageValue(cid, rock) == 2
		then
			doCreatureSay(cid, "This rock has already been harvested, wait for it to grow back.", TALKTYPE_ORANGE_1)		
				return true
			

			end
				return true

			end

Now im having two problems, the first being that it removes the item, waits half a second, THEN puts the new item there (I want it to be all at once).

Also, after you mine it and it turns into the new object, it never returns back into its old self.