RigidBody2D.velocity inconsistant

Here is the simple test.

test

My player (the white square) moves on a horizontal axis to the left for this test. Here is the code for that

 horizontalMove = Input.GetAxisRaw("Horizontal");
         m_Rigidbody2D.velocity = new Vector2(horizontalMove * speed * Time.deltaTime, m_Rigidbody2D.velocity.y); 
     Debug.Log(m_Rigidbody2D.velocity.x * Time.deltaTime);  

As you can see in the console I have 273 different velocity values for the ~4 seconds of left movement and can't get a consistent time.

Here is the timer script also. The timer start code is in the movement script, the same one as above

 if (m_Rigidbody2D.velocity != Vector2.zero) //timer start
             timerStart = true;

timer script:

 public class timer : MonoBehaviour
 {
     public Text timerText;
     private float startTime;
     string seconds;
     public bool finish;
     private float time;
     private float finishComparable;
     public prefInit scores;
     public Movement player;
     private bool activeTimer;
 
     void Start()
     {
         startTime = Time.time; //time since beginning of this frame
     }
 
     void Update()
     {        
         if (finish) //------------check if current time is lower than playerpref time
             return;        
         else if (!finish && activeTimer)
         {
             string minutes = ((int)time / 60).ToString();  //update minutes for time
             int minutes_int = ((int)time / 60);
             float seconds1 = (time % 60);  //temporary time variable for easy comparison
             if (seconds1 < 10)
             {
                 seconds = "0" + seconds1.ToString("f3");   //update if seconds is less than 10 for the extra 0
             }
             else
             {
                 seconds = seconds1.ToString("f3");  //updates seconds for time
             }
             time += Time.deltaTime;  //sets local time value to ingame time
             finishComparable = (minutes_int * 60) + seconds1;
             timerText.text = minutes + ":" + seconds;  //sets screen timer text to ingame time
         }
         else if (player.timerStart)
         {
             activeTimer = true;
         }
     }
     public void Finish()
     {
         finish = true;                
         PlayerPrefs.SetFloat("composite", (PlayerPrefs.GetFloat("composite") + finishComparable));
         Debug.Log(PlayerPrefs.GetFloat("composite"));
         if (PlayerPrefs.GetInt("sceneIndex") == 2)
             PlayerPrefs.SetFloat("level1", 1);
         else if (PlayerPrefs.GetInt("sceneIndex") == 3)
             PlayerPrefs.SetFloat("level2", 1);
         else if (PlayerPrefs.GetInt("sceneIndex") == 4)
             PlayerPrefs.SetFloat("level3", 1);
         else if (PlayerPrefs.GetInt("sceneIndex") == 5)
             PlayerPrefs.SetFloat("level4", 1);
         Debug.Log(finishComparable);
         Composite();
     }
     private void Composite()
     {
         bool lvl1 = (PlayerPrefs.GetInt("level1") != 0);
         bool lvl2 = (PlayerPrefs.GetInt("level2") != 0);
         bool lvl3 = (PlayerPrefs.GetInt("level3") != 0);
         if (lvl1 && lvl2 && lvl3)
             scores.UpdateScore();
     }
 }

I understand that this script is poorly written; this is my first game