Iterating over array problem

I'm trying to grab all the floor tiles in a scene and store them in an array. After I've done that, I reorganize them into a new array based on their positioning. This script seems to fall apart when we start to arrange them into the new array. Where is my mistake here?

 GameObject[] initFloorTiles;

 GameObject[] floorTiles;

 void Awake()
 {

     initFloorTiles = GameObject.FindGameObjectsWithTag("floorTile");
     
 }
 // Start is called before the first frame update
 void Start()
 {

     for(int i = 0; i < initFloorTiles.Length; i++)
     {
         GameObject currFloorTile = initFloorTiles[i];

         switch (initFloorTiles[i].transform.position.z)
         {
             case 0:
                 switch (initFloorTiles[i].transform.position.x)
                 {
                     case 0:
                         floorTiles[0] = initFloorTiles[i];
                         Debug.Log("0");
                         break;
                     case 1:
                         floorTiles[1] = initFloorTiles[i];
                         Debug.Log("1");
                         break;
                     case 2:
                         floorTiles[2] = initFloorTiles[i];
                         Debug.Log("2");
                         break;
                     default:
                         
                         break;
                 }
                 break;
             case 1:
                 switch (initFloorTiles[i].transform.position.x)
                 {
                     case 0:
                         floorTiles[3] = initFloorTiles[i];
                         Debug.Log("3");
                         break;
                     case 1:
                         floorTiles[4] = initFloorTiles[i];
                         Debug.Log("4");
                         break;
                     case 2:
                         floorTiles[5] = initFloorTiles[i];
                         Debug.Log("5");
                         break;
                     default:

                         break;
                 }
                 break;
             case 2:
                 switch (initFloorTiles[i].transform.position.x)
                 {
                     case 0:
                         floorTiles[6] = initFloorTiles[i];
                         Debug.Log("6");
                         break;
                     case 1:
                         floorTiles[7] = initFloorTiles[i];
                         Debug.Log("7");
                         break;
                     case 2:
                         floorTiles[8] = initFloorTiles[i];
                         Debug.Log("8");
                         break;
                     default:

                         break;
                 }
                 break;
             case 3:
                 switch (initFloorTiles[i].transform.position.x)
                 {
                     case 0:
                         floorTiles[9] = initFloorTiles[i];
                         break;
                     case 1:
                         floorTiles[10] = initFloorTiles[i];
                         break;
                     case 2:
                         floorTiles[11] = initFloorTiles[i];
                         break;
                     default:

                         break;
                 }
                 break;
             case 4:
                 switch (initFloorTiles[i].transform.position.x)
                 {
                     case 0:
                         floorTiles[12] = initFloorTiles[i];
                         break;
                     case 1:
                         floorTiles[13] = initFloorTiles[i];
                         break;
                     case 2:
                         floorTiles[14] = initFloorTiles[i];
                         break;
                     default:

                         break;
                 }
                 break;
             case 5:
                 switch (initFloorTiles[i].transform.position.x)
                 {
                     case 0:
                         floorTiles[15] = initFloorTiles[i];
                         break;
                     case 1:
                         floorTiles[16] = initFloorTiles[i];
                         break;
                     case 2:
                         floorTiles[17] = initFloorTiles[i];
                         break;
                     default:

                         break;
                 }
                 break;
             default:
                 
                 break;
         }
     }

     for(int i = 0; i < floorTiles.Length; i++)
     {
         Debug.Log("X position is " + floorTiles[i].gameObject.transform.position.x + " and Z position is " + floorTiles[i].gameObject.transform.position.z);
     }