Game object instantiated and added to list but the change in capacity shows that 4 game objects have been added to the list?

Pretty much as the title says. So my list capacity was not adding up when i checked it at the end of my code, but seemed fine in the inspector, so i broke it down and found an anomaly where my list capacity doubled. So first i made it where in the code above i instantiated an the object not to be the same object instantiated again (hence empty2). Did not work. So i thought that the instantiation duplication may be due to both the object being exactly the same, empty game objects, so i tagged empty2 with a new tag of empty 2. Still did not work! So here i am asking you if you know what is happening here. Thank you for any help. Apologies in advance for the messiness of my code (below).

 using UnityEngine;
 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine.UI;
 
 
 public class PolyDrawExample : MonoBehaviour
 {
     public int numberOfSides;
     public float polygonRadius;
     public Vector2 polygonCenter;
     public GameObject empty;
     public GameObject empty2;
     List<GameObject> Lines;
     Line Line;
 int i;
 List<Vector3> Vertices;
 Vector2 currentCorner;
 public GameObject button;
 public GameObject buttonObj;
 new public Camera camera;
 public Transform canvas;
 Vector3 buttonPressed;
 int i2;
 List<GameObject> Buttons;
 int i3;

 void Start()
 {
     numberOfSides = 5;
     polygonRadius = 2.5f;
     i = 1;
     polygonCenter = new Vector2(0, 0);
     Lines = new List<GameObject>();
     Vertices = new List<Vector3>();
     Buttons = new List<GameObject>();
     Line = GetComponent<Line>();
     DrawPolygon(polygonCenter, polygonRadius, numberOfSides);
 }

 void Update()
 {
     i2 = 0;
     while (numberOfSides + 1 > i2)
     {
         if (Buttons[i2].GetComponent<ButtonPressControl>().click == true)
         {
             Debug.Log(Buttons[i2].name + " is pressed");
         }
         i2 = i2 + 1;
     }

 }

 void DrawPolygon(Vector2 center, float rad, int numSides)
 {
     Vector2 startCorner = new Vector2(rad, 0) + polygonCenter;
     Vector2 previousCorner = startCorner;

     for (i = 1; i < numSides; i++)
     {
         float cornerAngle = 2f * Mathf.PI / (float)numSides * i;
         currentCorner = new Vector2(Mathf.Cos(cornerAngle) * rad, Mathf.Sin(cornerAngle) * rad) + polygonCenter;
         // create empty game object
         GameObject lin = Instantiate(empty) as GameObject;
         // name it with number
         lin.name = "Line " + i;
         // add to lines list
         Lines.Add(lin);
         // create new line (made class in Line). Attach game object and corners and colours
         Line.line line = new Line.line(Lines[i - 1], currentCorner, previousCorner, Color.blue);
         // attach the linerenderer to game object with said info from above
         Line.setupline(line);

         // Having used the current corner, it now becomes the previous corner.
         previousCorner = currentCorner;

         Vertices.Insert(i - 1, previousCorner);
     }
     // lines list capacity is 4
     // Draw the final side by connecting the last corner to the starting corner.
     GameObject li = Instantiate(empty2) as GameObject;
     li.name = "Line " + i;
     Debug.Log(Lines.Capacity);
     // is 4 as should be      LOOK HERE    LOOK HERE    LOOK HERE   LOOK HERE   LOOK HERE - obvious enough i hope... :(
     Lines.Add(li);
     Debug.Log(Lines.Capacity);
     // is 8???               LOOK HERE    LOOK HERE   LOOK HERE   LOOK HERE   LOOK HERE
     Line.line linee = new Line.line(Lines[i - 1], startCorner, previousCorner, Color.blue);
     Line.setupline(linee);
     Vertices.Insert(i - 1, startCorner);

     GameObject sphere = GameObject.CreatePrimitive(PrimitiveType.Sphere);
     sphere.transform.position = Vector3.zero;
     sphere.transform.localScale = new Vector3(0.2f, 0.2f, 0.2f);
     sphere.GetComponent<Renderer>().material = new Material(Shader.Find("GUI/Text Shader"));
     sphere.GetComponent<Renderer>().material.color = Color.blue;
     i = 1;

     //Creates center lines
     while (i < numSides + 1)
     {
         GameObject li2 = Instantiate(empty) as GameObject;
         li2.name = "Line " + (i + numberOfSides);
         Lines.Add(li2);
         Line.line linee2 = new Line.line(Lines[i + numSides - 1], Vector3.zero, Vertices[i - 1], Color.blue);
         Line.setupline(linee2);
         i = i + 1;
     }
     i = 1;
     while(i < numSides + 1)
     {
         GameObject sphere2 = GameObject.CreatePrimitive(PrimitiveType.Sphere);
         sphere2.transform.position = Vertices[i - 1];
         sphere2.transform.localScale = new Vector3(0.1f, 0.1f, 0.1f);
         sphere2.GetComponent<Renderer>().material = new Material(Shader.Find("GUI/Text Shader"));
         sphere2.GetComponent<Renderer>().material.color = Color.blue;
         i = i + 1;
     }

     Vertices.Add(Vector3.zero);
     i = 1;
     while (i < numSides + 2)
     {
         GameObject Button = Instantiate(button) as GameObject;
         Button.transform.SetParent(canvas, false);
         Button.transform.position = camera.WorldToScreenPoint(Vertices[i - 1]);
         Button.name = "Button " + i;
         Buttons.Add(Button);
         i = i + 1;
     }
 }

}

Ideas of what is causing the problem -

• As in the inspector there is no other game objects maybe the error relates to the .Add function on the list