Player Flipping and Shot/Tilemap bugs

Well, I'm new to unity and I'm trying to make a simple platform, my player has the basic functions working but I found some bugs that I have no idea how they appeared and how to fix them.

The Bugs are: My bullet at a specific point on the map crosses the tilemap

Rotating the player makes it move 1 frame to the side and grab walls

Codes (I accept suggestions for new ones if they are better) :

• Player Controller

     public Rigidbody2D theRB;
       public float moveSpeed;
       public float jumpForce;
       public Transform groundPoint;
       private bool isOnGround;
       public LayerMask whatIsGround;
       public Animator anim;
       public BulletController shotToFire;
       public Transform shotPoint;
       private bool canDoubleJump;
   
       
   
       // Start is called before the first frame update
       void Start()
       {
           
       }
   
       // Update is called once per frame
       void Update()
       {
           
   
           //Move sideways
           theRB.velocity = new Vector2(Input.GetAxisRaw("Horizontal") * moveSpeed, theRB.velocity.y);
   
           //handle Direction Change
           if(theRB.velocity.x< 0)
           {
               transform.localScale = new Vector3(-1f, 1f, 1f);
           }   
           else if (theRB.velocity.x> 0)
           {
               transform.localScale = Vector3.one;
           }
   
           
   
           //Ground if on Ground
           isOnGround = Physics2D.OverlapCircle(groundPoint.position, .2F, whatIsGround);
   
   
           //Jumping
           if (Input.GetButtonDown("Jump") && (isOnGround || canDoubleJump) )
           {
               if (isOnGround)
               {
                   canDoubleJump = true;
               } else {
                   canDoubleJump = false;
                   anim.SetTrigger("doubleJump");
               }
   
               theRB.velocity = new Vector2(theRB.velocity.x, jumpForce);            
   
           }
   
   
           if(Input.GetButtonDown("Fire1"))
           {
               Instantiate(shotToFire, shotPoint.position, shotPoint.rotation).moveDir = new Vector2(transform.localScale.x, 0f);
   
               anim.SetTrigger("shotFired");
           }
   
           anim.SetBool("isOnGround", isOnGround);
           anim.SetFloat("speed", Mathf.Abs (theRB.velocity.x));
       }
   
   }
  
   
  
  
  

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• Bullet Controller

     public float bulletSpeed;
       public Rigidbody2D theRB;
       public Vector2 moveDir;
       public GameObject ImpactEffect;
   
       // Update is called once per frame
       void Update()
       {
           theRB.velocity = moveDir * bulletSpeed;
       }
   
       
       private void OnTriggerEnter2D(Collider2D other)
       {
           if(ImpactEffect != null)
           Instantiate(ImpactEffect, transform.position, Quaternion.identity);
   
           Destroy(gameObject);
   
       }
   
       
       private void OnBecameInvisible()
       {
           Destroy(gameObject);
       }
       
   }