php export เป็น excel แล้วฟอแมตเพี้ยน แก้ยังไงครับ

<?PHP ob_start();?>
<?PHP
		include("connect/connect.php"); 
		include_once("class/php_writeexcel-0.3.0/class.writeexcel_worksheet.inc.php");
		include_once("class/php_writeexcel-0.3.0/class.writeexcel_workbook.inc.php");

		$st_date = $_POST[st_date];
		$end_date = $_POST[end_date];		
		
		$token = md5( uniqid(rand(), true ) );
		$fname= "tmp/$token.xls";
		$workbook =& new writeexcel_workbook($fname);
		$worksheet =& $workbook->addworksheet("Test");
		$worksheet->set_margin_right(0.50);
		$worksheet->set_margin_bottom(1.10);
			
		## Set Format  ##
		$xlscelldesc_header =& $workbook->addformat();
		$xlscelldesc_header->set_font('Angsana New');
		$xlscelldesc_header->set_size(14);
		$xlscelldesc_header->set_color('black');
		$xlscelldesc_header->set_bold(1);
		$xlscelldesc_header->set_align('left');
		$xlscelldesc_header->set_text_v_align(1);
		$xlscelldesc_header->set_merge(1);
		
		$xlsCellDesc =& $workbook->addformat();
		$xlsCellDesc->set_font('Angsana New');
		$xlsCellDesc->set_size(14);
		$xlsCellDesc->set_color('black');
		$xlsCellDesc->set_bold(0);
		$xlsCellDesc->set_align('left');
		$xlsCellDesc->set_text_v_align(1);
		## End of Set Format ##
		
		## Set Column Width & Height  to Cell
		$worksheet->set_column('A:B',10);
		$worksheet->set_column('B:C',8);
		$worksheet->set_column('C:D',10);
		$worksheet->set_column('D:E',10);
		$worksheet->set_column('E:F',10);
		$worksheet->set_column('F:G',13);
		$worksheet->set_column('G:H',10);
		$worksheet->set_column('H:I',10);
		$worksheet->set_column('I:J',10);
		$worksheet->set_column('J:K',10);
		$celldesc_h = 10;
		
		//หัวคอลัมม์
		$xlsRow = 1;
		$worksheet->set_row($xlsRow,$celldesc_h);
		$worksheet->write("A$xlsRow","ลำดับ", $xlscelldesc_header);
		$worksheet->write("B$xlsRow","จังหวัด", $xlscelldesc_header); 
		$worksheet->write("C$xlsRow","สาขา", $xlscelldesc_header);
		$worksheet->write("D$xlsRow","ชื่อ-สกุล", $xlscelldesc_header);
		$worksheet->write("E$xlsRow","เพศ", $xlscelldesc_header);
		$worksheet->write("F$xlsRow","หมายเลขโทรศัพท์", $xlscelldesc_header);
		$worksheet->write("G$xlsRow","อีเมล์", $xlscelldesc_header);
		$worksheet->write("H$xlsRow","ยี่ห้อรถ", $xlscelldesc_header);
		$worksheet->write("I$xlsRow","รุ่น", $xlscelldesc_header);
		$worksheet->write("J$xlsRow","ปีรุ่น", $xlscelldesc_header);
		$xlsRow++;	
		$no_format =& $workbook->addformat(array(num_format => '0'));
		$no_format->set_align('center');
		$character =& $workbook->addformat();
		$sql = "SELECT 
		request_customer.rcust_id,
		request_customer.rcust_fullname,
		REPLACE(REPLACE(request_customer.rcust_gender,'M','ชาย'),'F','หญิง') AS GENDER,
		request_customer.rcust_email,
		request_customer.rcust_dateadd,
		INSERT(INSERT(request_customer.rcust_telephone,7,0,'-'),4,0,'-') AS telephone, 
		request_customer.rcust_brand,
		request_customer.rcust_model,
		request_customer.rcust_myear,
		depart.depart as rcust_province,
		depart_sub.depart_sub as rcust_branch
		FROM request_customer 
		INNER JOIN depart ON request_customer.rcust_province = depart.id
		INNER JOIN depart_sub ON request_customer.rcust_branch = depart_sub.id
		WHERE date(request_customer.rcust_dateadd) BETWEEN  '$st_date' AND  '$end_date' 
		ORDER BY request_customer.rcust_dateadd";
		$Query = mysql_query($sql);
		//$countNo=1;
		while($rows = mysql_fetch_array($Query))
		{
			
			$worksheet->set_row($xlsRow, 15.80);
			//$worksheet->write("A$xlsRow", $countNo, $character);
			$worksheet->write("B$xlsRow", $rows['rcust_province'], $character); 
			$worksheet->write("C$xlsRow", $rows['rcust_branch'], $character);
			$worksheet->write("D$xlsRow", $rows['rcust_fullname'], $character); 
			$worksheet->write("E$xlsRow", $rows['rcust_gender'], $character);
			$worksheet->write("F$xlsRow", $rows['rcust_telephone'], $character);
			$worksheet->write("G$xlsRow", $rows['rcust_email'], $character);
			$worksheet->write("H$xlsRow", $rows['rcust_brand'], $character);
			$worksheet->write("I$xlsRow", $rows['rcust_model'], $character);
			$worksheet->write("J$xlsRow", $rows['rcust_myear'], $character);
			$xlsRow++;	
			//$countNo++;
		}
//Save as Excel						
$workbook->close();
header("Pragma: public");
header("Expires: 0");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0"); 
header("Content-Type: application/force-download");
header("Content-Type: application/octet-stream");
header("Content-Type: application/download");
header("Content-Disposition: attachment; filename=".basename('Rcust_'.$st_date.'_'.$end_date.'.xls').";");
header("Content-Transfer-Encoding: UTF-8");
header("Content-Length: ".filesize($fname));
readfile($fname); 
unlink($fname);
exit();
?>
<?php
ob_end_flush();
?>