Score goes up in inconsistent values, help please

Unity Engine
1

Hi all, I have a game where i have a sphere collider set to “is trigger” and whenever the airplane i have hits it the score increases by 1. At least that is the intention, it always goes up at inconsistent rates, from 2 -7. I added in my code something that would destroy the collider a soon as the plane hit it, but it still didnt work, Here is my code (Javascript)

How do i fix it so that the score always goes up by 1 or my set value? Thanks!

#pragma strict

private var Score : int = 0;
var guiScore : GUIText;

function Start () {
guiScore.text = “Score: 0”;
}

function Update () {

}

function OnTriggerEnter(col : Collider){
if(col.collider.name == “Sphere”){
Destroy(col.gameObject);
Score += 1 ;
guiScore.text= "Score: " +Score;
print(“Hit!”);
}
}

2 
#pragma strict

 private var Score : int = 0;
 var guiScore : GUIText;



//If i u wont u cna make this too  tahy say if the score is 100 u load a new Leve 
   function Update()
  {
            if( Score == 100)
            {
                Application.LoadLevel(0);
            }
   }

 


 function OnTriggerEnter(other : Collider )
 {
  	
  	Debug.Log("OnTriggerEnter() was called");
  	
  	 if (other.tag == "Sphere"){
 
 		Debug.Log("Other object is a coin");
	 	Score += 1 ;

	 	guiScore.text= "Score: " +Score;
	 	
 		print("Hit!");
 		Destroy(other.gameObject);
	 }
 }
3

u need to put this script to the Player