Script Spawning Double?

I am trying to work on a script to spawn a gameobject at a random position between a range of positions but not too close to each other. It is spawning, just not correctly. It is spawning 2 sets of 12 random positions instead of just 1 set. Each set is following the correct range rules, however when the 2 sets are put together, they don't follow the range rules and are overlapping. I am unsure where I went wrong with this script and would love to get some help with it.

Here it is: using System.Collections; using System.Collections.Generic; using UnityEngine;

 public class SpawnTest : MonoBehaviour 
 {
     public GameObject prefab;
     public int wayPoints = 12;
     public float minDist = 1f;
 
     public List<Vector3> waypointPositions = new List<Vector3>();
 
      
     void Start ()
     {
         FillList();
     }
 
     void FillList ()
     {
         for (int i = 0; i < wayPoints; i++)
         {
             while (waypointPositions.Count < wayPoints)
             {
                 Vector3 randomPos = new Vector3(Random.Range(-2f, 2f), Random.Range(.5f, 4f), 0f);
 
                 bool isClose = false;
                 foreach (Vector3 wp in waypointPositions)
                 {
                     if (Vector3.Distance(wp, randomPos) <= minDist) 
                     {
                         //Debug.Log("dist: " + Vector3.Distance(wp, randomPos));
 
                         isClose = true;
                     }
                 }
 
                 if (!isClose)
                 {
                     waypointPositions.Add(randomPos);
                     Instantiate(prefab, randomPos, prefab.transform.rotation);
                     break;
                 }
             }
         }
     }
 }

When putting wayPoints = 6, I get 18 actual wayPoints. When putting wayPoints to 12, I get 24 waypoints. When putting wayPoints to 24, I get 12 wayPoints.