opening a door with animation

hello, I have been on this problem much of the day. and searched for answers and thought I had one. I did, but to a degree. The problem I'm having is when I trigger a door to open it, about 50% of the time it will close back. the same for the closing animation, except it will reopen. does anyone have a solution. The code that I found was in javaScript, but I converted it to C#. The commented code below is what I was doing earlier, until I found that code... thanks

 using System.Collections;
 
 public class OpeningClosingAnim : MonoBehaviour 
 {
     public GameObject door;
     
     public bool haveKey;
 
     //public bool opened = false;
     
     private bool HasTriggerBeenUsed = false;
     private bool setTrigger = false;
     
 
     void OnTriggerStay()
     {
         if(    haveKey && Input.GetKeyUp(KeyCode.E) && !HasTriggerBeenUsed)
         {
             door.animation.Play("OpeningDoor02");    
             setTrigger = true;
             
         }
         
         else if(haveKey &&  Input.GetKeyUp(KeyCode.E) && HasTriggerBeenUsed)
         {
             door.animation.Play("ClosingDoor03");
             setTrigger = true;
             
         }
         if (setTrigger) 
         { 
             HasTriggerBeenUsed = !HasTriggerBeenUsed; 
         }
         
     }
     
 }
 
 
 
 
 
 //    // Use this for initialization
 //    void Start () 
 //    {
 //        //opened = true;
 //
 //    }
 //    
 //    // Update is called once per frame
 //    void Update () 
 //    {
 //        // add raycast once door works as expected
 //        OpeningAndClosingDoor();
 //        
 //        
 //        
 //    
 //    }
 //    
 //    
 //    
 //    void OpeningAndClosingDoor()
 //    {
 //        if(opened == false && haveKey && Input.GetKeyDown(KeyCode.E))
 //        {
 //            
 //            
 //            
 //            animation.Play("OpeningDoor02");
 //            opened = true;
 //                
 //               if(opened == true && haveKey &&  Input.GetKeyDown(KeyCode.E))
 //                {
 //                    animation.Play("ClosingDoor03");    
 //            
 //                }
 //            else if(!haveKey)
 //            {
 //                opened = false;
 //                // add Gui text that player needs key
 //            }
 //            
 //        }
 //        
 //
 //        
 //        
 //    }