Why the object is not moving only on the x ?

In the editor I have a parent object and it's Y rotation set to 15
Under this I have some children.

Then I have another object that is not child of the parent also rotation set to 15 and position on the parent position in the center. When I drag the object with the red arrow in the editor in the scene view it's moving only on the x fine.

But in the game when I click the mouse button I see for some reason that the object is moving on x but also on the z.


But now I'm clicking once on the Video cube(button) in the game window and the object VideoAudioCube is moving again only on the X but for some reason even if the Z not changing I see that the object is also moving on the Z .


But when the VideoAudioCube is moving when I click the Video it's moving only on the X at least I see in the editor only the X changing but it's moving also on the Z:

This is the code the code is attached to the New Game cube gameobject a child under Buttons :

Code (csharp):

1.  
2. using System.Collections;
3. using System.Collections.Generic;
4. using UnityEngine;
5.  
6. public class VideoSettings : MonoBehaviour
7. {
8.     public MeshRenderer VideoAudioCube;
9.     public float speed = 5f;
10.     public float distanceToMove;
11.  
12.     private bool keepMoving = true;
13.     private Vector3 startPos;
14.     private Vector3 endPos;
15.     private bool moveBack = false;
16.  
17.     private void Start()
18.     {
19.         startPos = VideoAudioCube.transform.position;
20.     }
21.  
22.     private void OnMouseDown()
23.     {
24.         if (keepMoving == true)
25.         {
26.             if(VideoAudioCube.transform.position == startPos)
27.             {
28.                 moveBack = false;
29.             }
30.  
31.             if (transform.GetComponentInChildren<TextMesh>().text == "Video")
32.             {
33.                 StartCoroutine(MoveVideo());
34.             }
35.  
36.             keepMoving = false;
37.         }
38.     }
39.  
40.     private IEnumerator MoveVideo()
41.     {
42.         endPos = VideoAudioCube.transform.position + Vector3.right * distanceToMove;
43.  
44.         VideoAudioCube.enabled = true;
45.  
46.         if (moveBack == false)
47.         {
48.             while (VideoAudioCube.transform.position != endPos)
49.             {
50.                 VideoAudioCube.transform.position =
51.                   Vector3.MoveTowards(VideoAudioCube.transform.position, endPos, Time.deltaTime * speed);
52.                 yield return null;
53.             }
54.         }
55.         else
56.         {
57.             while (VideoAudioCube.transform.position != startPos)
58.             {
59.                 VideoAudioCube.transform.position =
60.                     Vector3.MoveTowards(VideoAudioCube.transform.position, startPos, Time.deltaTime * speed);
61.                 yield return null;
62.             }
63.         }
64.  
65.         keepMoving = true;
66.         moveBack = true;
67.     }
68. }
69.  

The Main Camera rotation is set to 0,0,0 and positioned in front of Buttons.

 

Found the problem : The endPos should be transform.tight instead Vector3.right :

Instead this line :

Code (csharp):

1.  
2. endPos = VideoAudioCube.transform.position + Vector3.right * distanceToMove;
3.  

It should be like this :

Code (csharp):

1.  
2. endPos = VideoAudioCube.transform.position + VideoAudioCube.transform.right * distanceToMove;
3.