Why is Unity showing the wrong variables in the Inspector?

Why in the world is Unity showing variables from a different script?

 using UnityEngine;
 
 public class AudioController : MonoBehaviour {
     private AudioSource audio;
     public AudioClip cubeSelectSound;
 
     private void Start() {
         audio = GetComponent<AudioSource>();
     }
 
     public void PlaySoundOnCubeSelection() {
 
         if (!selectedCubes.Contains(gameObject)) {
             float soundPitch;
 
             switch (selectedCubes.Count) {
                 case 1:
                     soundPitch = 1f;
                     break;
                 case 2:
                     soundPitch = 1.02f;
                     break;
                 case 3:
                     soundPitch = 1.04f;
                     break;
                 case 4:
                     soundPitch = 1.06f;
                     break;
                 default:
                     soundPitch = 0;
                     break;
             }
 
             PlaySoundOnce(soundPitch);
         }
     }
 
     private void PlaySoundOnce(float soundPitch = 1f) {
         audio.pitch = soundPitch;
         audio.PlayOneShot(cubeSelectSound, 1f);
     }
 }