Weird Movement with Position Set

Questions & Answers
1

I have an object (Object 1) whose position is set to the position of another object (Object 2), but when I move object 2, It is just slightly behind. Because of the function of the two, I’m not sure if I can just set it as a child. Here’s the basic code:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Attach : MonoBehaviour {

	public Transform aa;
	void Start () 
	{
		aa = aa.GetComponent<Transform>();
	}
	
	// Update is called once per frame
	void FixedUpdate () 
	{
		transform.position = aa.position;
	}
}
2

You have to do that:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class Attach : MonoBehaviour {
 
     public Transform aa;
     private float aaPositionX;
     private float aaPositionY;
     private float thisObjectPositionX;
     private float thisObjectPositionY;
     void Start () 
     {
         aa = aa.GetComponent<Transform>();
         aaPositionX = aa.position.x;
         aaPositionY = aa.position.y;

         thisObjectPositionX = transform.position.x;
         thisObjectPositionY = transform.position.y;
     }
     
     // Update is called once per frame
     void FixedUpdate () 
     {
         transform.position = new Vector3(thisObjectPositionX, thisObjectPositionY, 0);
     }
 }