C# WinApp task[] ให้ค่าซ้ำกัน ครับ แต่ถ้าใช้ thread ไม่มีปัญหาครับ

new System.Threading.Thread(getListHTMLByTask).Start();

void getListHTMLByTask()
        {
            //เก็บเวลาเริ่มต้นทำงาน
            DateTime s = DateTime.Now;
            string strsearch = txtS.Text;
            int _min = int.Parse("0" + txtMin.Text);
            int _max = int.Parse("0" + txtMax.Text);
            var tasks = new List<Task>(); // สร้าง task มาใช้งานซะ
            for (int i = _min; i <= _max; i++)
            {
                
                tasks.Add( Task.Run(() =>
                {
                    // เรียกใช้ delecate getListHTMLByTask
                  //    getList(new object[] { "http://www.one2up.com/list_content.php?page=" + i + "&txt_Search=" + strsearch + "&radio_type=content_Name"});//member_displayname
                  getList(new object[] { "http://www.one2up.com/list_content.php?page=" + i + "&txt_Search=" + strsearch + "&radio_type=member_displayname"});//member_displayname
                }));
            }
            try
            {
                //ขณะรอก็จิบ 40 degree ไปก่อน
                Task.WaitAll(tasks.ToArray());
            }
            catch { }
            //เก็บเวลาสิ้นสุดการทำงาน
            DateTime ss = DateTime.Now;
            TimeSpan ts = ss - s;
            //ประมวลเวลาทั้งหมด
            this.Invoke(new Action(() => { this.Text = "run complete.. Time:" + ts.Hours + ":" + ts.Minutes + ":" + ts.Seconds + " " + ts.Milliseconds; }));

        }

void getListHTMLByThread()
        {
            string strsearch = txtS.Text;
            int _min = int.Parse("0" + txtMin.Text);
            int _max = int.Parse("0" + txtMax.Text);

           for (int i = _min; i <= _max; i++)
            {
                new System.Threading.Thread(getList).Start(new object[] { "http://www.one2up.com/list_content.php?page=" + i + "&txt_Search=" + strsearch + "&radio_type=content_Name" });//member_displayname
                try
                { this.Invoke(new Action(() => { Text = "URL:" + "http://www.one2up.com/list_content.php?page=" + i + "&txt_Search=" + strsearch + "&radio_type=content_Name"; })); }
                catch { }
                new System.Threading.Thread(getList).Start(new object[] { "http://www.one2up.com/list_content.php?page=" + i + "&txt_Search=" + strsearch + "&radio_type=member_displayname" });//member_displayname
                try
                { this.Invoke(new Action(() => { Text = "URL:" + "http://www.one2up.com/list_content.php?page=" + i + "&txt_Search=" + strsearch + "&radio_type=member_displayname"; })); }
                catch { } 
                System.Threading.Thread.Sleep(100);
            }
        }

        void getList(object obj)
        {
            string URL = (string)((object[])obj)[0];
            string _HTML = clsHTML.getHTML(URL);
            string strID = "";
            System.Text.RegularExpressions.Regex.Matches(_HTML, @"(?:<div.*?(view_content.php\?content_ID=[0-9]+)\"".*?<b>(.*?)<.*?ขนาดไฟล์(.*?)<br>)")
                      .OfType<System.Text.RegularExpressions.Match>().ToList<System.Text.RegularExpressions.Match>()
                      .ForEach(match =>
                      {
                          try
                          {
                              strID = new System.Text.RegularExpressions.Regex(@"""txt_URL"" id=""txt_URL"" value=[\""|']?(.*?)[\""|'|>]", System.Text.RegularExpressions.RegexOptions.Singleline | System.Text.RegularExpressions.RegexOptions.CultureInvariant).Matches(clsHTML.getHTML("http://www.one2up.com/" + match.Groups[1].Value))[0].Groups[1].Value;//regexDate.Matches(strID)[0].Groups[1].Value
                             
                              System.Threading.Thread.Sleep(200);
                              dataGridView1.Invoke(new Action(() => { 
                                  dataGridView1.Rows.Add("http://www.one2up.com/" + match.Groups[1].Value, match.Groups[2].Value, match.Groups[3].Value, strID, "");
                                  dataGridView1.Refresh();
                              }));
                          }
                          catch { }
                      });
            try
            { this.Invoke(new Action(() => { Text = "Set Link Complete...."; })); }
            catch { } 
        }