Out from plugin getting over-written by EE?

http://example.com/military/blogs/test

{assign_variable:section="blogs"}
{assign_variable:template_group="blogs"}
{assign_variable:prod_division="{exp:ooc_eeurl}"}

{exp:weblog:entries limit="1"}
{prod_division}
{/exp:weblog:entries}

{prod_division}

military military

Here is a pared down version of my page:
[code]{assign_variable:section="blogs"}
{assign_variable:template_group="blogs"}
{assign_variable:prod_division="{exp:ooc_eeurl}"}

{prod_division}

{exp:weblog:entries limit="1"}
{prod_division}
{/exp:weblog:entries}

{prod_division}

http://dev.whitesdiving.com/military/blogs/test

<?php
/* ============================================================================
pi.ooc_eeurl.php
Returns the visual url segment and not the true url segment 

INFO --------------------------------------------------------------------------
Developed by: James Riordon, Out of Control
Created:   July 17th 2009

CHANGELOG & OTHER INFO --------------------------------------------------------
See README.textile
=============================================================================== */

$plugin_info = array(
            'pi_name'            => 'OOC Eeurl',
            'pi_version'        => '0.1.0',
            'pi_author'            => 'James Riordon',
            'pi_author_url'        => 'http://outofcontrol.ca/',
            'pi_description'    => 'Pulls the visual URL segments instead of the real ones',
            'pi_usage'            => Ooc_eeurl::usage()
        );


Class Ooc_eeurl {

    var $return_data;


    // ----------------------------------------
    //  eexcerpt
    // ----------------------------------------

    function ooc_eeurl()
    {
        global $TMPL;

        $segment = ( ! $TMPL->fetch_param('segment')) ? '1' :  $TMPL->fetch_param('segment');
        
        if ( ! is_numeric($segment) || $segment > 10 ) $segment = 1;
                
        $this->return_data = $this->_pull_url_segments($segment);
    }

    
    function _pull_url_segments($segment = 1)
    {
        $url_array = explode("/",rtrim($_SERVER["REQUEST_URI"],"/"));
        
        $theCount = count($url_array);

//        $clean_url = array_map(array($this, "_clean_url"), $url_array);

        $clean_url = $url_array;

        return trim($clean_url[$segment]); 
   }

    function _clean_url($data)
    {
        return $data;
    }
    // END    

    
// ----------------------------------------
//  Plugin Usage
// ----------------------------------------

// This function describes how the plugin is used.
//  Make sure and use output buffering

function usage()
{
ob_start(); 
?>
how to use it
<?php
$buffer = ob_get_contents();
ob_end_clean(); 
return $buffer;
}
// END
}
// END CLASS
?>