overlap between scenes!!!

o_O I put script in parent gameObject for fps....and i forget it....Thx for everyone try to help me.

 using UnityEngine;
 using System.Collections;
 
 public class FPSDisplayScript : $$anonymous$$onoBehaviour {
     float timeA;
     public int fps;
     public int lastFPS;
     public GUIStyle textStyle;
     // Use this for initialization
     void Start () {
         timeA = Time.timeSinceLevelLoad;
         DontDestroyOnLoad (this);
     }
     
     // Update is called once per frame
     void Update () {
         //Debug.Log(Time.timeSinceLevelLoad+" "+timeA);
         if(Time.timeSinceLevelLoad  - timeA <= 1)
         {
             fps++;
         }
         else
         {
             lastFPS = fps + 1;
             timeA = Time.timeSinceLevelLoad;
             fps = 0;
         }
     }
     void OnGUI()
     {
         GUI.Label(new Rect( 450,5, 30,30),""+lastFPS,textStyle);
     }
 }