Tetris Controls - Input calling multiple times

I am invoking functions to perform a grid like movement. Sometimes my functions are getting multiple inputs and my pieces are stuck traveling I am guessing twice the speed.

I tried using a bunch of booleans to catch this but it doesn't see to work.

Here is my code:

  void TetrisInputR()
     {
         InvokeRepeating("TetrisMoveR", tetrisMoveSpeed * Time.deltaTime, tetrisMoveSpeed * Time.deltaTime);
     }
 
     void TetrisMoveR()
     {
         this.transform.position = new Vector2(this.transform.position.x + .5f, this.transform.position.y);
         Debug.Log("HORZ Right");
     }
 
     void TetrisInputL()
     {
         InvokeRepeating("TetrisMoveL", tetrisMoveSpeed * Time.deltaTime, tetrisMoveSpeed * Time.deltaTime);
     }
 
     void TetrisMoveL()
     {
         this.transform.position = new Vector2(this.transform.position.x - .5f, this.transform.position.y);
         Debug.Log("HORZ LEFT");
     }
 
 void Update()
 {
 
   //Tetris Horz
             if (Input.GetKeyDown(KeyCode.A) && Tetris && !isLpressed)
             {
                 isLpressed = true;
                 bool once = true;
                 {
                     TetrisInputL();
                 }
                 once = false;
             }
 
             if (Input.GetKeyUp(KeyCode.A) && Tetris)
             {
                 CancelInvoke("TetrisMoveL");
                 isLpressed = false;
             }
 
             if (Input.GetKeyDown(KeyCode.D) && Tetris && !isRpressed)
             {
                 isRpressed = true;
                 bool once = true;
                 {
                     TetrisInputR();
                 }
                 once = false;
             }
 
             if (Input.GetKeyUp(KeyCode.D) && Tetris)
             {
                 CancelInvoke("TetrisMoveR");
                 isRpressed = false;
             }
 
 }