Why my score is counting like 11 22 33 44 ?

someone help me!
thats the score script

public int myCurScore;
public TextMesh score;
private bool clicked;

void Start () {

	clicked = false;
	myCurScore = 1;

	spa = FindObjectOfType (typeof(SpawObject)) as SpawObject;

}

// Update is called once per frame

				
void Update () {
	

	}	
void OnMouseDown(){
	clicked = !clicked;

	if ( clicked == true){

		Debug.Log(myCurScore);

		
					score.text = "" + myCurScore.ToString ();
			

					myCurScore += 1;
			}

	}

}

I think there are two instances of this script in your scene.

the object where is the script atacthed is making clones. maybe there is something associated to that?