Spawn gap in unity?

I am currently creating an endless runner type of game where two objects(good and bad) are getting spawned from three spawn points randomly at different times. The problem i am encountering is that two objects spawn together sometimes. I tried to make a script that destroys one of the objects if they collide together, but it did not work. Check attached screenshots and the script.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class Grouping : MonoBehaviour
 {    
 
     private void OnCollisionEnter2D(Collision2D col)
     {
         if(gameObject.tag == "Enemy")
         {
             Destroy(gameObject); 
             Debug.Log("success");
         }
     }
     
 }

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