Destroy(gameObject) not working

I have two scripts that randomly spawn models in an area and then respawn ones the overlap. I can't find any errors in the code, but when Destroy(gameObject); is called in the second script, it seems to do nothing. Here is the base spawning script:

 using UnityEngine;
 using System.Collections;

 public class CreateBuildings : MonoBehaviour {

     public GameObject ThreeSBWR;
     public GameObject ThreeSB;
     public GameObject TwoSBWR;
     public GameObject TwoSB;
     public GameObject OneSBWR;
     public GameObject OneSB;
     public int ThreeSBTS;
     public int TwoSBTS;
     public int OneSBTS;
     Quaternion SpawnRotation;

     void Start ()
     {
         int a;
         int b;
         int c;
         a = ThreeSBTS;
         while (a > 0)
         {
             Vector3 SpawnLocation;
             SpawnLocation = new Vector3(Random.Range(-90, 90), 2.5f, Random.Range(-90, 90));
             while (SpawnLocation.x < 15 && SpawnLocation.x > -15 && SpawnLocation.z < 15 && SpawnLocation.z > -15)
             {
                 SpawnLocation = new Vector3(Random.Range(-90, 90), 2.5f, Random.Range(-90, 90));
             }
             SpawnRotation.eulerAngles = new Vector3(0, Random.Range(0, 360), 0);
             float rand;
             rand = Random.Range(0, 1);
             if (rand >= 0.5f)
             {
                 Instantiate(ThreeSB, SpawnLocation, SpawnRotation);
             }
             else
             {
                 Instantiate(ThreeSBWR, SpawnLocation, SpawnRotation);
             }
             a -= 1;
         }
         b = TwoSBTS;
         while (b > 0)
         {
             Vector3 SpawnLocation;
             SpawnLocation = new Vector3(Random.Range(-90, 90), 2.5f, Random.Range(-90, 90));
             while (SpawnLocation.x < 15 && SpawnLocation.x > -15 && SpawnLocation.z < 15 && SpawnLocation.z > -15)
             {
                 SpawnLocation = new Vector3(Random.Range(-90, 90), 2.5f, Random.Range(-90, 90));
             }
             SpawnRotation.eulerAngles = new Vector3(0, Random.Range(0, 360), 0);
             float rand;
             rand = Random.Range(0, 1);
             if (rand >= 0.5f)
             {
                 Instantiate(TwoSB, SpawnLocation, SpawnRotation);
             }
             else
             {
                 Instantiate(TwoSBWR, SpawnLocation, SpawnRotation);
             }
             b -= 1;
         }
         c = OneSBTS;
         while (c > 0)
         {
             Vector3 SpawnLocation;
             SpawnLocation = new Vector3(Random.Range(-90, 90), 2.5f, Random.Range(-90, 90));
             while (SpawnLocation.x < 15 && SpawnLocation.x > -15 && SpawnLocation.z < 15 && SpawnLocation.z > -15)
             {
                 SpawnLocation = new Vector3(Random.Range(-90, 90), 2.5f, Random.Range(-90, 90));
             }
             SpawnRotation.eulerAngles = new Vector3(0, Random.Range(0, 360), 0);
             float rand;
             rand = Random.Range(0, 1);
             if (rand >= 0.5f)
             {
                 Instantiate(OneSB, SpawnLocation, SpawnRotation);
             }
             else
             {
                 Instantiate(OneSBWR, SpawnLocation, SpawnRotation);
             }
             c -= 1;
         }
     }
     public void Spawn(GameObject ToSpawn)
     {
         print("Call Successfull");
         Vector3 SpawnLocation;
         SpawnLocation = new Vector3(Random.Range(-90, 90), 2.5f, Random.Range(-90, 90));
         while (SpawnLocation.x < 15 && SpawnLocation.x > -15 && SpawnLocation.z < 15 && SpawnLocation.z > -15)
         {
             SpawnLocation = new Vector3(Random.Range(-90, 90), 2.5f, Random.Range(-90, 90));
         }
         Quaternion SpawnRot;
         SpawnRot = new Quaternion(0, 0, 0, 0);
         SpawnRot.eulerAngles = new Vector3(0, Random.Range(0, 360), 0);
         Instantiate(ToSpawn, SpawnLocation, SpawnRot);
         print("(Call) Spawn Complete");
     }
 }

Here is the script that checks for overlaps:

 using UnityEngine;
 using System.Collections;

 public class CollisionCheck : MonoBehaviour {

     void OnTriggerEnter(Collider col)
     {
         if (col.gameObject.name != "Player" && col.gameObject.name != "Ground" && col.gameObject.name != "Bullet(Clone)")
         {
             GameObject.Find("GameController").GetComponent<CreateBuildings>().Spawn(gameObject);
             print("Called");
             Destroy(gameObject);
         }
     }
     void OnTriggerStay(Collider col)
     {
         if (col.gameObject.name != "Player" && col.gameObject.name != "Ground" && col.gameObject.name != "Bullet(Clone)")
         {
             GameObject.Find("GameController").GetComponent<CreateBuildings>().Spawn(gameObject);
             print("Called");
             Destroy(gameObject);
         }
     }
 }

Here is a video showing what happens with different values for ThreeSBTS, TwoSBTS, and OneSBTS:

https://drive.google.com/open?id=0B_HzgsC9lP3nRURlaDUxQlJIOEk

As you can see in the video, the Destroy(gameObject); seems to do nothing, and the more buildings there are to spawn, the more likely that this causes problems. I would like to have 2, 4, and 6 as the values, but it rarely spawns correctly. Does anyone know how to fix this?