Item Icon goes to origin, not set transform. (JAVASCRIPT)

Hi all. I am making an inventory system for my fps game, and I have come across an issue. I have a bunch of panels that are activated and deactivated in order to show/hide my inventory. In the start function, I populate a panel with slots for an item. Then, in game, I can pick up items, and an item icon should be instantiated as a child of one of my available slots, and set in the center, (0,0). This works fine if I don't open my inventory (e) before picking up my item. The problem is when I open my inventory, close it, and try to pick it up. Then it goes to the origin, and is visible in the lower left corner. I will attach both scripts I am using in this process. Any help would be greatly appreciated, thanks!

Inventory Script:

 var itemsScreen : GameObject;
 var inventorySlot : GameObject;
 var inventoryItem : GameObject;
 var inventoryPanel : GameObject;
 var slotPanel : GameObject;
 var player : GameObject;
 var ammoText : GameObject;
 var crosshair : GameObject;
 /////////////////////////////////////////////
 var selectedSlot : Transform;
 var selectedItem : Transform;
 var originalSlot : Transform;
 /////////////////////////////////////////////
 var isPause : boolean;
 var inventoryUp : boolean;
 var isCreated : boolean;
 var receivedItem : boolean;
 var debuged : boolean;
 ////////////////////////////////////////////
 var slotAmount : int;
 var itemAmount : int;
 var itemId : int;
 /////////////////////////////////////////////
 var items : Item[];
 var equipMenu : Item[];
 var mainInventory : List.<Item> = new List.<Item>();
 var slots : List.<GameObject> = new List.<GameObject>();
 ////////////////////////////////////////////End variables
 function Start () {
 
 slotAmount = 16;
 //inventoryPanel = GameObject.Find("ItemPanel");
 //slotPanel = inventoryPanel.transform.FindChild("SlotPanel").gameObject;
 
 inventoryScreen.SetActive(false);
 inventoryUp = false;
 
 
 for(var q = 0; q < slotAmount; q++){
 
         slots.Add(Instantiate(inventorySlot));
         slots[q].transform.SetParent(slotPanel.transform);
         slots[q].GetComponent.<slotScript>().manager = gameObject;
         }
 
     ///////////////////////////////////////////////
 }
 
 
 function Update () {
 
 receivedItem = player.GetComponent.<ItemPickUp>().receivedItem;
 itemId = player.GetComponent.<ItemPickUp>().itemID;
 itemAmount = mainInventory.Count;
 isPause = GetComponent.<PauseMnue>().isPause;
 //////////////////////////////////////////////////////
 
 
 if(Input.GetKeyDown("e") && isPause == false){
 
     Screen.lockCursor = false;
     inventoryScreen.SetActive(true);
     ammoText.SetActive(false);
     crosshair.SetActive(false);
     inventoryUp = true;
     Time.timeScale = 0;
     }
 
 ///////////////////////////////////////////////////////
 
 if(receivedItem){
 
 AddToInventory ();
 
 }
 
 ////////////////////////////////////////////////////////
 }
 function BackInventory () {
 
     inventoryScreen.SetActive(false);
     Time.timeScale = 1;
     inventoryUp = false;
     ammoText.SetActive(true);
 }
 
 ////////////////////////////////////////////////////////
 function BackItemsPanel () {
 
 itemsScreen.SetActive(false);
 
 }
 ///////////////////////////////////////////////////////////
 
 function AddToInventory () {
 
 for(var i = 0; i < itemAmount; i++){
     
     for(var qq = 0; qq < slotAmount; qq++){
 
 
     if(slots[qq].transform.childCount <= 1){
 
         var newItemSlot : GameObject = Instantiate(inventoryItem);
 
         isCreated = true;
         receivedItem = false;
 
         newItemSlot.transform.SetParent(slots[i].transform);
         newItemSlot.transform.position = Vector2(0,0);
     
         
 
         }
         else
         {
         if(!debuged){
         Debug.Log("Inventory full");
         debuged = true;
         }
         }
         }
         }
         }
 
 
 function OnGUI () {
 
 
 
 }

Item Pick Up Script:

 var manager : GameObject;
 var hand : GameObject;
 var oldWeapon : GameObject;
 var itemToPickUp : GameObject;
 var originalScale : Vector3;
 var canPickUp : boolean;
 public var isEquipped : boolean;
 public var receivedItem : boolean;
 var itemIIcon : Sprite;
 var itemID : int;
 var items : Item[];
 public var itemAmount : float;
 
 function Update () {
 ////////////////////////////////////////////////////////////////
 var mainInventory = manager.GetComponent(inventory).mainInventory;
 var items = manager.GetComponent(inventory).items;
 
 
     if(itemToPickUp){
 
     var test = itemToPickUp.GetComponent.<itemId>().itemId;
 
         }
         else
         {
 
             test = -1;
 
             itemAmount = items.Length;
 }
 
 
 for(var a = 0; a < itemAmount; a++){
 
     if(itemToPickUp){
         if(test == items[a].itemId){
             
             itemID = items[a].itemId;
 
             }
         }
 }
 
     if(canPickUp && Input.GetKeyDown("f")){
 
         receivedItem = true;
 
         mainInventory.Add(items[itemID]);
 
         Destroy (itemToPickUp);
 
         canPickup = false;
 
         }
         else
         {
 
         receivedItem = false;
 
 }
 if(hand.transform.childCount == 1){
 
     isEquipped = true;
 
     }
 }
 function OnTriggerEnter (other : Collider){
 
     if(other.gameObject.tag == "Weapon"){
         for(var z = 0; z < itemAmount; z++){
         canPickUp = true;
 
         itemToPickUp = other.gameObject;
         itemIIcon = other.gameObject.GetComponent.<itemId>().itemIcon;
         }
         }
     }
 
 function OnTriggerExit (other : Collider){
 
     if(other.gameObject.tag == "Weapon"){
 
         canPickUp = false;
 
         itemToPickUp = null;
     
         }
     }
 
 function OnGUI (){
 
 if(canPickUp){
     if(itemToPickUp){
     GUI.Button(Rect(Screen.width/2 - 50, Screen.height/2 + 10 , 125, 25),"Pick Up: " + itemToPickUp.name);
     }
     }
 }