Two loops entering 4 record but there are only two records in the GridView.

int rowIndex = 0;
foreach (GridViewRow row in GridView1.Rows)

{
    if (row.RowType == DataControlRowType.DataRow)
    {
        CheckBox chkRow = (CheckBox)row.FindControl("orditems");
        if (chkRow.Checked)
        {

            if (ViewState["Sva_Medicines"] != null)
            {
                DataTable dt = (DataTable)ViewState["Sva_Medicines"];
                if (dt.Rows.Count > 0)
                {
                    //for loop for extract values
                    for (int i = 0; i < dt.Rows.Count; i++)
                   {

                        DropDownList Presc_id = GridView1.FooterRow.FindControl("txtprescnum") as DropDownList;
                        TextBox tmedname = GridView1.FooterRow.FindControl("txtmedname") as TextBox;
                        TextBox tmedbrand = GridView1.FooterRow.FindControl("txtmedbrand") as TextBox;
                        TextBox tmeduom = GridView1.FooterRow.FindControl("txtmeduom") as TextBox;
                        TextBox tmedprice = GridView1.FooterRow.FindControl("txtmedprice") as TextBox;
                        TextBox tmedcom = GridView1.FooterRow.FindControl("composition_txt") as TextBox;
                        TextBox medicine_name = GridView1.FooterRow.FindControl("txtmedname") as TextBox;
                        DropDownList Repeat_medicine = GridView1.FooterRow.FindControl("txtrepmed") as DropDownList;
                        DropDownList Morningflag = GridView1.FooterRow.FindControl("morningflag_ddl") as DropDownList;
                        DropDownList Afternoonflag = GridView1.FooterRow.FindControl("afternoonflag_ddl") as DropDownList;
                        DropDownList Eveningflag = GridView1.FooterRow.FindControl("eveningflag_ddl") as DropDownList;
                        DropDownList Dosage = GridView1.FooterRow.FindControl("Dosage_ddl") as DropDownList;
                        DropDownList Smsreminder = GridView1.FooterRow.FindControl("smsremainder_ddl") as DropDownList;
                        DropDownList Monthlyrefill = GridView1.FooterRow.FindControl("Monthlyrefill_ddl") as DropDownList;
                        TextBox Purpose = GridView1.FooterRow.FindControl("Purpose_txt") as TextBox;
                        TextBox tmedqty = GridView1.FooterRow.FindControl("txtmedqty") as TextBox;


                        Presc_id.SelectedItem.Text = dt.Rows[i]["Presc_num"].ToString();
                        tmedbrand.Text = dt.Rows[i]["Brand"].ToString();
                        tmeduom.Text = dt.Rows[i]["UOM"].ToString();
                        tmedqty.Text = dt.Rows[i]["Quantity"].ToString();
                        tmedprice.Text = dt.Rows[i]["Price"].ToString();
                        tmedcom.Text = dt.Rows[i]["Composition"].ToString();
                        medicine_name.Text = dt.Rows[i]["Medicine_name"].ToString();
                        Morningflag.Text = dt.Rows[i]["Morning_Flag"].ToString();
                        Afternoonflag.Text = dt.Rows[i]["Afternoon_Flag"].ToString();
                        Eveningflag.Text = dt.Rows[i]["Evening_Flag"].ToString();
                        Dosage.Text = dt.Rows[i]["Dosage"].ToString();
                        Smsreminder.Text = dt.Rows[i]["SMS_Remainder"].ToString();
                        Purpose.Text = dt.Rows[i]["Purpose"].ToString();
                        Repeat_medicine.Text = dt.Rows[i]["Repeat_medicine"].ToString();



                        SqlCommand cmd1 = new SqlCommand("insert into Sva_Medicines (Presc_id,Medicine_name,Brand,UOM,Quantity,Price,Repeat_medicine,Composition,Purpose,Dosage,SMS_Remainder,Morning_Flag,Afternoon_Flag,Evening_Flag,Monthly_Refill)  Values(@Presc_id,@Medicine_name,@Brand,@UOM,@Quantity,@Price,@Repeat_medicine,@Composition,@Purpose,@Dosage,@SMS_Remainder,@Morning_Flag,@Afternoon_Flag,@Evening_Flag,@Monthly_Refill)", conne, trans);
                        cmd1.Parameters.AddWithValue("@Presc_id", Session["id"]);
                        cmd1.Parameters.AddWithValue("@Medicine_name", tmedname.Text);
                        cmd1.Parameters.AddWithValue("@Brand", tmedbrand.Text);
                        cmd1.Parameters.AddWithValue("@UOM", tmeduom.Text);
                        cmd1.Parameters.AddWithValue("@Quantity", tmedqty.Text);
                        cmd1.Parameters.AddWithValue("@Price", tmedprice.Text);
                        cmd1.Parameters.AddWithValue("@Composition", tmedcom.Text);

                        cmd1.Parameters.AddWithValue("@Purpose", Purpose.Text);
                        cmd1.Parameters.AddWithValue("@Dosage", Dosage.Text);
                        cmd1.Parameters.AddWithValue("@SMS_Remainder", Smsreminder.Text);
                        cmd1.Parameters.AddWithValue("@Morning_Flag", Morningflag.Text);
                        cmd1.Parameters.AddWithValue("@Afternoon_Flag", Afternoonflag.Text);
                        cmd1.Parameters.AddWithValue("@Evening_Flag", Eveningflag.Text);
                        cmd1.Parameters.AddWithValue("@Monthly_Refill", Monthlyrefill.Text);

                        cmd1.Parameters.AddWithValue("@Created_by", txt_mcreateby.ToString());
                        cmd1.Parameters.AddWithValue("@Created_date", txt_mcreatedate);
                        cmd1.Parameters.AddWithValue("@Updated_by", txt_mupdatedby.ToString());
                        cmd1.Parameters.AddWithValue("@Repeat_medicine", Repeat_medicine.Text);
                        cmd1.Parameters.AddWithValue("@Updated_date", txt_mupdateddate);
                        cmd1.ExecuteNonQuery();
                        Page.Controls.Add(new LiteralControl("<script>alert('Record inserted successfully');</script>"));


                        rowIndex++;
                        chkRow.Checked = false;

                   }

                }


            }

        }
    }
}