move this code block form line 73 - 80:
<?php
// WA eCart Redirect
if ($natashaCart->redirStr != "") {
if (function_exists("rel2abs")) $natashaCart->redirStr = rel2abs($natashaCart->redirStr,dirname(__FILE__));
header("Location: ".$natashaCart->redirStr);
die();
}
?>
so that it is just before the doctype tag.