จะแบ่งหน้าการโชว์ข้อมูลหน้าละ 10 record แต่ทำไมหน้าแรกยังมี 13 record ไม่รู้ผิดตรงไหนนะคะ

<?
$objConnect = mysql_connect("localhost","root","root") or die("Error Connect to Database");
$objDB = mysql_select_db("mydatabase");
$strSQL = "SELECT * FROM tbl_book ";
$objQuery = mysql_query($strSQL) or die ("Error Query [".$strSQL."]");
$Num_Rows = mysql_num_rows($objQuery);

$Per_Page = 10;   // Per Page

$Page = $_GET["Page"];
if(!$_GET["Page"])
{
	$Page=1;
}

$Prev_Page = $Page-1;
$Next_Page = $Page+1;

$Page_Start = (($Per_Page*$Page)-$Per_Page);
if($Num_Rows<=$Per_Page)
{
	$Num_Pages =1;
}
else if(($Num_Rows % $Per_Page)==0)
{
	$Num_Pages =($Num_Rows/$Per_Page) ;
}
else
{
	$Num_Pages =($Num_Rows/$Per_Page)+1;
	$Num_Pages = (int)$Num_Pages;
}

$strSQL .=" order  by no_id ASC LIMIT $Page_Start , $Per_Page";
$objQuery  = mysql_query($strSQL);
?>
    <table width="708" border="0" align="center">

      <tr>
        <td width="116" height="30" bgcolor="#E7F4FF" class="inputproject"><div align="center" class="text1">รหัสหนังสือ</div></td>
        <td width="181" bgcolor="#E7F4FF" class="inputproject"><div align="center" class="text1">ชื่อหนังสือ</div></td>
        <td width="83" bgcolor="#E7F4FF" class="inputproject"><div align="center" class="text1">หมวดหนังสือ</div></td>
        <td width="105" bgcolor="#E7F4FF" class="inputproject"><div align="center" class="text1">ผู้แต่ง</div></td>
        <td width="54" bgcolor="#E7F4FF" class="inputproject"><div align="center" class="text1">เลข dewey </div></td>
        <td width="54" bgcolor="#E7F4FF" class="inputproject"><div align="center" class="text1">จำนวน</div></td>
        <td width="85" bgcolor="#E7F4FF" class="inputproject"><div align="center" class="text1">
          <div align="center">จัดการข้อมูล</div>
        </div></td>
      </tr>
	  <?
$no = 0;
if($Page > 1)
{
		$no = $Per_Page * $Page;
}
while($objResult = mysql_fetch_array($objQuery))
{
	$no++;
?>
          <? while ($data=mysql_fetch_array($sql_select)){
$sql_=mysql_query("select * from type_book where id=$data[book_type]");
$data_=mysql_fetch_array($sql_);
?>
      <tr>
        <td height="22" bgcolor="#FFFFCC" class="inputtext"><?=$data[no_id] ;?></td>
        <td bgcolor="#FFFFCC" class="inputtext">&nbsp;&nbsp;<? echo"$data[book_name]"; ?></td>
        <td bgcolor="#FFFFCC" class="inputtext"><?=$data_[name] ;?></td>
        <td bgcolor="#FFFFCC" class="inputtext"><div align="center">
          <?=$data[book_author] ;?>
        </div></td>
        <td bgcolor="#FFFFCC" class="inputtext"><div align="center">
          <?=$data[book_dewey];?>
        </div></td>
        <td bgcolor="#FFFFCC" class="inputtext"><div align="center">
          <?=$data[book_num] ;?>
        </div></td>
        <td bgcolor="#FFFFCC" class="inputtext"><div align="center">
        <a href="<? echo"?name=admin&file=Book& delete=$data[id] ";?>"><img src="images/cancel.gif" width="16" height="16" border="0"></a> &nbsp;&nbsp;<a href="<? echo"?name=admin&file=Book& edit=$data[id]";?>"><img src="images/validate.png" width="16" height="16" border="0"></a></div></td>
      </tr>
            <? }?>
			<?
}
?>
    </table>
	Total <?= $Num_Rows;?> Record : <?=$Num_Pages;?> Page :
<?
if($Prev_Page)
{
	echo " <a href=''index.php?name=admin&file=Book&Page=$Prev_Page'><< Back</a> ";
}

for($i=1; $i<=$Num_Pages; $i++){
	if($i != $Page)
	{
		echo "[ <a href='index.php?name=admin&file=Book&Page=$i'>$i</a> ]";
	}
	else
	{
		echo "<b> $i </b>";
	}
}
if($Page!=$Num_Pages)
{
	echo " <a href ='index.php?name=admin&file=Book&Page=$Next_Page'>Next>></a> ";
}
mysql_close($objConnect);
?>