Wave script not working...

Hello so I just tried to make a wave scrip but I cant figure out why it is not working. I made a class called Wave to hold floats and ints of how many enemies to spawn and how often. The problem is that I want it to change after I kill all of the enemies. The problem is that instantly when I start the game it goes through all of my waves and reaches the end. I honestly dont know what is happening.

Spawn Script

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class EnemySpawnManager : MonoBehaviour {
 
     public EnemyController Enemy;
 
     public Transform Spawn1;
     public Transform Spawn2;
 
     //Setting Wave System
     Wave currentWave;
     int currentWaveCount;
     int RemainingEnemiesToSpawn;
     public Wave[] Waves;
         
 
     [System.Serializable]
     public class Wave
     {
         public int enemyCount;
 
         public float timeBetweenSpawn;
         public float SpawnCounter;
     }
 
     void NextWave()
     {
         if(currentWaveCount -1 <= Waves.Length)
         {
             currentWaveCount++;
             currentWave = Waves[currentWaveCount - 1];
 
             RemainingEnemiesToSpawn = currentWave.enemyCount;
         }
     }
 
     // Use this for initialization
     void Start () {
         NextWave();
         currentWave.SpawnCounter = currentWave.timeBetweenSpawn;
         RemainingEnemiesToSpawn = currentWave.enemyCount;
     }
     
     // Update is called once per frame
     void Update () {
         currentWave.SpawnCounter -= Time.deltaTime;
 
         if (currentWave.SpawnCounter <= 0)
         {
             RemainingEnemiesToSpawn--;
             currentWave.SpawnCounter = currentWave.timeBetweenSpawn;
 
             EnemyController newEnemy1 = Instantiate(Enemy, Spawn1.position, Spawn1.rotation) as EnemyController;
         }
 
         if(RemainingEnemiesToSpawn > 0)
         {
             NextWave();
         }
     }
 }
 

Thank you for taking the time in helping me.