404s from Windows Live Writer (wlwmanifest.xml) call

Hi,
I have a 404 error on each of my site pages (/function.strpos) that I have traced back to a window’s live writer call originating from wp-includes. A previous thread has suggested adding

<?php

remove_action('wp_head', 'wlwmanifest_link');

// other helper functions you might have, i.e.
	$numposts = $wpdb->get_var("SELECT COUNT(*) FROM $wpdb->posts WHERE post_status = 'publish'");
		if (0 < $numposts) $numposts = number_format($numposts); 

	$numcmnts = $wpdb->get_var("SELECT COUNT(*) FROM $wpdb->comments WHERE comment_approved = '1'");
		if (0 < $numcmnts) $numcmnts = number_format($numcmnts);

?>

to my functions.php file, which I have done in my child theme after closing out the existing code with a final ?>
so it now reads

<?php
/*-------------------------------------------------------*/
/* Run Theme Blvd framework (required)
/*-------------------------------------------------------*/

require_once ( TEMPLATEPATH . '/framework/themeblvd.php' );

/*-------------------------------------------------------*/
/* Start Child Theme
/*-------------------------------------------------------*/

// Start the party ...

// Add stylesheet - Level 4, will get added after EVERYTHING
themeblvd_add_stylesheet( 'custom_styles', get_stylesheet_directory_uri().'/assets/css/custom.css', 4 );

/*disable rss*/
remove_action('wp_head', 'feed_links', 2 );
add_filter('post_comments_feed_link','bfr_disable_comments_feeds');
function bfr_disable_comments_feeds() {
    return null;
}

?>

<?php

remove_action('wp_head', 'wlwmanifest_link');

// other helper functions you might have, i.e.
	$numposts = $wpdb->get_var("SELECT COUNT(*) FROM $wpdb->posts WHERE post_status = 'publish'");
		if (0 < $numposts) $numposts = number_format($numposts); 

	$numcmnts = $wpdb->get_var("SELECT COUNT(*) FROM $wpdb->comments WHERE comment_approved = '1'");
		if (0 < $numcmnts) $numcmnts = number_format($numcmnts);

?>

The problem is that this has not been successful, and I still see 404s for /function.strpos on each page. Any ideas what I could be doing wrong here would be much appreciated.

The site is https://www.proofscience.com