Enemy makes player glitch through walls

So I made a player controller, which includes a wall mechanisem since i don't use physics to move. here's all the playerControl script: using UnityEngine; using System.Collections;

 public class PlayerControl: MonoBehaviour {
 
     Vector3 pos;
 
     public Animation ani;
 
     int dir;
 
     BoxCollider2D boxCollider;
 
     public LayerMask blockingLayer;
 
     bool[] isAllowd;
 
     // Use this for initialization
     void Start () {
         pos = GetComponent<Transform> ().position;
         dir = 0;
 
         isAllowd = new bool[4]{ true, true, true, true };
 
         boxCollider = GetComponent<BoxCollider2D> ();
     }
     
     // Update is called once per frame
     void Update () {
 
         GetComponent<Animator> ().speed = 0;
 
         if (Input.GetKey (KeyCode.D)&&advanceMove(0.03f,0)) {
             pos.x += 0.03f;
             dir = 0;
             GetComponent<Animator> ().SetInteger ("dir", dir);
             GetComponent<Animator> ().speed = 1;
         }
         if (Input.GetKey (KeyCode.A)&&advanceMove(-0.03f,0)) {
             pos.x -= 0.03f;
             dir = 2;
             GetComponent<Animator> ().SetInteger ("dir", 2);
             GetComponent<Animator> ().speed = 1;
         }
         if (Input.GetKey (KeyCode.W)&&advanceMove(0,0.03f)) {
             pos.y += 0.03f;
             dir = 1;
             GetComponent<Animator> ().SetInteger ("dir", 1);
             GetComponent<Animator> ().speed = 1;
         }
         if (Input.GetKey (KeyCode.S)&&advanceMove(0,-0.03f)) {
             pos.y -= 0.03f;
             dir = 3;
             GetComponent<Animator> ().SetInteger ("dir", 3);
             GetComponent<Animator> ().speed = 1;
         }
             
         GetComponent<Transform> ().position = pos;
 
         if (transform.childCount != 0) {
             transform.GetChild (0).gameObject.GetComponent<WeapondData>().setAttack(dir);
         }
 
     }
         
 
     protected bool move (float xDir, float yDir, int adder)
     {
         RaycastHit2D hit;
 
         Vector2 start = transform.position;
     
         if (xDir != 0) {
             start.x += (GetComponent<BoxCollider2D> ().size.x / 2) * (xDir / Mathf.Abs (xDir));
             start.y += (adder * (GetComponent<BoxCollider2D> ().size.y / 2));
         } else if (yDir != 0) {
             start.y += (GetComponent<BoxCollider2D> ().size.y / 2) * (yDir / Mathf.Abs (yDir));
             start.x += (adder * (GetComponent<BoxCollider2D> ().size.x / 2));
         }
 
         Vector2 end = start + new Vector2 (xDir, yDir);
 
         boxCollider.enabled = false;
 
         hit = Physics2D.Linecast (start, end, blockingLayer);
 
         boxCollider.enabled = true;
 
         //Check if anything was hit
         if(hit.transform == null)
         {
             return true;
         }
             
         return false;
     }
 
     private bool advanceMove(float xDir, float yDir)
     {
         return (move (xDir, yDir, 0) && move (xDir, yDir, 1) && move (xDir, yDir, -1));
     }
 }

I also made an enemy which is still until you get close enough, then he chases you. here's the basicEnemy script: using UnityEngine; using System.Collections;

 public class basicEnemy : MonoBehaviour {
 
 
     /** enemy needs:
      * a weapond
      * health
      * basic movement AI
      * */
 
     float hp;
 
 
     // Use this for initialization
     void Start () {
     
     }
     
     // Update is called once per frame
     void Update () {
         searchAndDestroy ();
 
     
     }
 
     protected Vector3 lockOn()
     {
         Collider2D[] col = Physics2D.OverlapCircleAll (transform.position, 3);
 
         Vector2 t;
 
         float minLength=9999;
         Vector3 returned=transform.position;
 
         for (int i = 0; i < col.Length; i++) {
             t = (Vector2)(transform.position - col [i].transform.position);
 
             if ((minLength > t.magnitude)&&col[i].gameObject.tag=="Player") {
                 minLength = t.magnitude;
                 returned = col [i].transform.position;
             }
         }
 
         Debug.Log (returned);
         return returned;
     }
 
     protected bool inRange()
     {
         return true;
     }
 
     protected void animate(Vector3 target)
     {
         float x = Mathf.Abs (transform.position.x - target.x);
         float y = Mathf.Abs (transform.position.y - target.y);
         float axis = Mathf.Max (x,y);
 
         if (x == axis) {
             
             GetComponent<Animator> ().SetInteger ("dir", 0);
             if (transform.position.x > target.x) {
                 GetComponent<SpriteRenderer> ().flipX = true;
             } else {
                 GetComponent<SpriteRenderer> ().flipX = false;
             }
         }
 
         if (y == axis) {
             if (transform.position.y > target.y) {
                 GetComponent<Animator> ().SetInteger ("dir", 1);
             } else {
                 GetComponent<Animator> ().SetInteger ("dir", 3);
             }
         }
 
         GetComponent<BoxCollider2D> ().size = Vector3.Scale (transform.localScale, GetComponent<SpriteRenderer> ().sprite.rect.size);
 
     }
 
     protected void searchAndDestroy()
     {
         Vector3 target = lockOn ();
 
         animate (target);
 
         transform.position = Vector3.MoveTowards (transform.position, target, 0.02f);
     }
 }
 

The thing I noticed during testing is, although the playerControl works perfectly, WHEN THE ENEMY LOCKS ON YOU the player can suddenly glitch through walls. Now it's not a smooth movement, but you can defenetly glitch there. Did anyone notice anything in basicEnemy that can inturrupt the functioning of playerControl?