IF and ELSE IF both true at the same time??

Unity Engine
1

I attached this code to a child of some GameObject, what the code is doing is just checking if the collision happens between child and parent (that is what it should do, but it doesnt work ??).

    private void OnTriggerStay(Collider other)
    {
        if( other.gameObject.GetInstanceID() == transform.parent.gameObject.GetInstanceID())
        {
            Debug.Log("other gameobject instance ID: " + other.gameObject.GetInstanceID());
        }
        else if (other.gameObject.GetInstanceID() != transform.parent.gameObject.GetInstanceID())
        {
            Debug.Log("this gamobject instance ID: " + transform.parent.gameObject.GetInstanceID());
        }
       
    }

2

Never mind, figured it out, I had 2 same looking but different gameobject at same place, didn’t see it before because I have very messy hierarchy :=(