Erroneous characters when using perch_page_attributes()

Greetings.

In order to set up FB and twitter page attributes I've followed the instructions laid out here however on rendering the page two erroneous ">" symbols appear at the very top of the html, which are clearly coming from the attributes templates in use. Check it out here: ngagewifi.com

My templates are a little different from the examples in the URL but the example provided actually produces four erroneous symbols.

So is there anything obvious going on here?

Here's my attributes template contents:

<meta name="description" content="<perch:pages id="description" label="Description" type="textarea" size="xs" escape="true" />" />
<meta name="keywords" content="<perch:pages id="keywords" label="Keywords" type="textarea" size="xs" escape="true" help="Separate with commas" />" />
<meta name="robots" content="<perch:pages id="noindex" label="Do not index" type="checkbox" value="noindex" append="," divider-before="Search engine indexing" /><perch:pages id="nofollow" label="Do not follow links" type="checkbox" value="nofollow" append="," /><perch:pages id="nosnippet" label="Do not show a snippet" type="checkbox" value="nosnippet" append="," />" />

<meta property="og:site_name" content="<perch:pages id="sitename" type="hidden" />" />
<meta property="og:url" content="<perch:pages id="url" type="hidden" />" />
<meta property="og:title" content="<perch:pages id="og_title" label="Social title" type="text" escape="true" help="Title for this document with no branding or site name" divider-before="Facebook Open Graph Tags" />" />
<meta property="og:description" content="<perch:pages id="og_description" label="Social description" type="textarea" size="s" escape="true" />" />
<perch:if exists="og_image"><meta property="og:image" content="<perch:pages id="domain" type="hidden" /><perch:pages id="og_image" label="Image when shared" help="Should be at least 1200x630" type="image" width="1200" />" /><perch:else /><meta property="og:image" content="<perch:pages id="domain" type="hidden" /><perch:pages id="sharing_image" type="hidden" />" /></perch:if>
<perch:if exists="og_type"><meta property="og:type" content="<perch:pages id="og_type" label="Facebook type" type="select" options="article,book,profile,website,video,music" allowempty="true" />" /></perch:if>
<perch:if exists="og_author"><meta property="article:author" content="<perch:pages id="og_author" type="hidden" />" /></perch:if>

<meta name="twitter:card" content="summary" />
<meta name="twitter:site" content="<perch:pages id="twittername" type="hidden" />" />
<meta name="twitter:title" content="<perch:pages id="og_title" label="Social title" type="text" escape="true" help="Title for this document with no branding or site name" />" />
<meta name="twitter:description" content="<perch:pages id="og_description" label="Social description" type="textarea" size="s" escape="true" />" />
<perch:if exists="og_image"><meta property="twitter:image" content="<perch:pages id="domain" type="hidden" /><perch:pages id="og_image" label="Image when shared" help="Should be at least 1200x630" type="image" width="1200" />" /></perch:if>
<meta name="twitter:url" content="<perch:pages id="url" type="hidden" />" />

==

Perch: 2.8.7, PHP: 5.4.14, MySQL: 5.1.71, with PDO
Server OS: Linux, fpm-fcgi
Installed apps: content (2.8.7), assets (2.8.7), categories (2.8.7), perch_blog (4.5.4), perch_forms (1.8.2), perch_shop_foxycart (2), perch_members (1.1)
App runtimes: <?php $apps_list = array( 'content', 'categories', 'perch_shop_foxycart', 'perch_blog', 'perch_forms', 'perch_members' );
PERCH_LOGINPATH: /perch
PERCH_PATH: /chroot/home/ngagedig/ngagewifi.com/html/perch
PERCH_CORE: /chroot/home/ngagedig/ngagewifi.com/html/perch/core
PERCH_RESFILEPATH: /chroot/home/ngagedig/ngagewifi.com/html/perch/resources
Image manipulation: GD Imagick
PHP limits: Max upload 64M, Max POST 64M, Memory: 512M, Total max file upload: 64M
Resource folder writeable: Yes
HTTP_HOST: ngagewifi.com
DOCUMENT_ROOT: /home/ngagedig/ngagewifi.com/html
REQUEST_URI: /perch/core/settings/diagnostics/
SCRIPT_NAME: /perch/core/settings/diagnostics/index.php