Opencart Info Page - opencart

Question

OK, I have been searching for quite some time, and this has me baffled.
I'm trying to add an ad that will pull up more info in the main content section.
If you look at http://teachingforapples.com/ , you'll see 2 links below the orange ad on the left. The only difference between those links is the information ID. However, they behave very differently. The one that says 'about' opens inside the main content area, but the one that says 'referral' opens full window.
There's nothing in the document content that would change this behavior.
The links are made exactly the same in the code except for the ID #.
The generated code shows the same kind of link, neither one has a target attrib.
I can't find anything in any of the modules that has logic code that looks at the doc id #.
So, I started looking at the database. I looked at all the information tables, but don't see anything different between the 2 pages.
Can someone point me in the right direction please? I feel that it must be something simple, but I just can't find it.
Thanks
P.S. the Information module is NOT installed.
Here's the information.php file.
<?php
class ControllerInformationInformation extends Controller {
public function index() {
$this->language->load('information/information');
$this->load->model('catalog/information');
$this->data['breadcrumbs'] = array();
$this->data['breadcrumbs'][] = array(
'text' => $this->language->get('text_home'),
'href' => $this->url->link('common/home'),
'separator' => false
);
if (isset($this->request->get['information_id'])) {
$information_id = (int)$this->request->get['information_id'];
} else {
$information_id = 0;
}
$information_info = $this->model_catalog_information->getInformation($information_id);
if ($information_info) {
$this->document->setTitle($information_info['title']);
$this->data['breadcrumbs'][] = array(
'text' => $information_info['title'],
'href' => $this->url->link('information/information', 'information_id=' . $information_id),
'separator' => $this->language->get('text_separator')
);
$this->data['info_id'] = $information_id;
$this->data['heading_title'] = $information_info['title'];
$this->data['button_continue'] = $this->language->get('button_continue');
$this->data['description'] = html_entity_decode($information_info['description'], ENT_QUOTES, 'UTF-8');
$this->data['continue'] = $this->url->link('common/home');
if (file_exists(DIR_TEMPLATE . $this->config->get('config_template') . '/template/information/information.tpl')) {
$this->template = $this->config->get('config_template') . '/template/information/information.tpl';
} else {
$this->template = 'default/template/information/information.tpl';
}
$this->children = array(
'common/column_left',
'common/column_right',
'common/content_top',
'common/content_bottom',
'common/footer',
'common/header'
);
$this->response->setOutput($this->render());
} else {
$this->data['breadcrumbs'][] = array(
'text' => $this->language->get('text_error'),
'href' => $this->url->link('information/information', 'information_id=' . $information_id),
'separator' => $this->language->get('text_separator')
);
$this->document->setTitle($this->language->get('text_error'));
$this->data['heading_title'] = $this->language->get('text_error');
$this->data['text_error'] = $this->language->get('text_error');
$this->data['button_continue'] = $this->language->get('button_continue');
$this->data['continue'] = $this->url->link('common/home');
if (file_exists(DIR_TEMPLATE . $this->config->get('config_template') . '/template/error/not_found.tpl')) {
$this->template = $this->config->get('config_template') . '/template/error/not_found.tpl';
} else {
$this->template = 'default/template/error/not_found.tpl';
}
$this->children = array(
'common/column_left',
'common/column_right',
'common/content_top',
'common/content_bottom',
'common/footer',
'common/header'
);
$this->response->setOutput($this->render());
}
}
public function info() {
$this->load->model('catalog/information');
if (isset($this->request->get['information_id'])) {
$information_id = (int)$this->request->get['information_id'];
} else {
$information_id = 0;
}
$information_info = $this->model_catalog_information->getInformation($information_id);
if ($information_info) {
$output = '<html dir="ltr" lang="en">' . "\n";
$output .= '<head>' . "\n";
$output .= ' <title>' . $information_info['title'] . '</title>' . "\n";
$output .= ' <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">' . "\n";
$output .= ' <meta name="robots" content="noindex">' . "\n";
$output .= '</head>' . "\n";
$output .= '<body>' . "\n";
$output .= ' <h1>' . $information_info['title'] . '</h1>' . "\n";
$output .= html_entity_decode($information_info['description'], ENT_QUOTES, 'UTF-8') . "\n";
$output .= ' </body>' . "\n";
$output .= '</html>' . "\n";
$this->response->setOutput($output);
}
}
}
?>