Double Jump makes my character fly into the sky

Hi Im making a 2D Platformer and have just added a Double Jump ability to my character. The problem is that when You double tap the guiTexture(Android Touch controls) The character does the first jump fine, Then on the second Jump (Double Jump) He jumps really high, Up to the ceiling!

Here are the two scripts PlayerLogic.cs and PlayerJump.cs

PlayerLogic.cs using UnityEngine; using System.Collections;

 public class PlayerLogic : MonoBehaviour {
 
     public Transform GroundStart, GroundEnd;
     public bool grounded  = false;
     public static float jumpForce = 0f;
     public static float doubleJumpForce = 0f; 
     public static bool doubleJump = false;
     public float MoveSpeed = 3f;
     public static int jumpCount = 0; 
 
     //Movement booleans
     public static bool MoveRight = false;
     public static bool MoveLeft = false;
     public static bool Jump = false;
     // Use this for initialization
     void Update()
     {
         //Run these to functions
         Raycasting();
         Movement();
     }
 
     void Raycasting()
     {
         //Draw a line from the start position, to the end position.
         Debug.DrawLine(this.transform.position, GroundEnd.position, Color.green);
         //If Raycast detects the Ground layer from the end point of the line, then IsGrounded becomes true
         grounded = Physics2D.Linecast(this.transform.position, GroundEnd.position, 1 << LayerMask.NameToLayer("Ground"));
     }
 
     void Movement()
     {
         //Touch Controls
 
         if(MoveRight == true)
         {
             transform.Translate(Vector2.right * MoveSpeed * Time.deltaTime);
             transform.eulerAngles = new Vector2(0, 0);
         }
         if(MoveLeft == true)
         {
             transform.Translate(Vector2.right * MoveSpeed * Time.deltaTime);
             transform.eulerAngles = new Vector2(0, 180);  
         }
         
         if(Jump == true && grounded == true)
         {
             rigidbody2D.AddForce(Vector2.up * jumpForce);
             Jump = false;
         }
         if(doubleJump == true && grounded == false) 
         {
             doubleJumpForce = 300f;
             rigidbody2D.AddForce(Vector2.up * doubleJumpForce);
             doubleJump = false;
         }
         if(grounded == true)
         {
             jumpCount = 0; 
         }
         if(jumpCount == 0)
         {
             jumpForce = 0f;
             doubleJumpForce = 0f;
         }
         if(jumpCount == 1)
         {
             Debug.Log("1 Jump");
         }
         else if(jumpCount == 2)
         {
             Debug.Log("2 Jumps");
         }
 
         //Key Controls
 
         /*if(Input.GetKey (KeyCode.D))
         {
             transform.Translate(Vector2.right * MoveSpeed * Time.deltaTime);
             transform.eulerAngles = new Vector2(0, 0);
         }
         if(Input.GetKey (KeyCode.A)) 
         {
             transform.Translate(Vector2.right * MoveSpeed * Time.deltaTime);
             transform.eulerAngles = new Vector2(0, 180);  
         }
         
         if(Input.GetKeyDown (KeyCode.Space) && grounded)
         {
             rigidbody2D.AddForce(Vector2.up * jumpForce);
         }*/
 
     }
 }

PlayerJump.cs

 using UnityEngine;
 using System.Collections;
 
 public class PlayerJump : MonoBehaviour {
     
     // Update is called once per frame
     void Update () 
     {
         //Is there a touch?
         if(Input.touches.Length <= 0)
         {
             //If no touches...
         }
         else //If screen touched..
         {
             //Loop through these
             for(int i = 0; i < Input.touchCount; i++)
             { 
                 //executes this code for current touch
                 if(this.guiTexture.HitTest(Input.GetTouch(i).position))
                 {
                     PlayerLogic.Jump = true;
                     PlayerLogic.jumpCount = 1;
                     PlayerLogic.jumpForce = 300f;
                 }
 
                 if(Input.GetTouch(i).tapCount == 2)
                 {
                     PlayerLogic.doubleJump = true;
                     PlayerLogic.jumpCount = 2;
                     PlayerLogic.doubleJumpForce = 300f;
                 }
             }
         }
     }
 }

I hope you can understand my question.

Thanks in advance.