flat rate options for australian post

[delia]

My client has a flat rate module installed on his cart which he says was working fine (though I'm beginning to wonder). If you are Australian and go thru checkout , you have 2 choices, one is for common and one is for express. No matter which one you choose, the higher express rate shows on the payment page. I 've check the mod and check the page source to see if the radio buttons have the correct values and they do. So I now turn to the forum. So you see anything wrong with this or can you think of what might be happening?

class flat {
    var $code, $title, $description, $icon, $enabled, $is_international;

// class constructor
    function flat() {
      global $order, $db;

      $this->code = 'flat';
      $this->title = MODULE_SHIPPING_FLAT_TEXT_TITLE;
      $this->description = MODULE_SHIPPING_FLAT_TEXT_DESCRIPTION;
      $this->sort_order = MODULE_SHIPPING_FLAT_SORT_ORDER;
      $this->icon = '';
      $this->tax_class = MODULE_SHIPPING_FLAT_TAX_CLASS;
      $this->tax_basis = MODULE_SHIPPING_FLAT_TAX_BASIS;
      
      $this->is_international = false;

      // disable only when entire cart is free shipping
      if (zen_get_shipping_enabled($this->code)) {
        $this->enabled = ((MODULE_SHIPPING_FLAT_STATUS == 'True') ? true : false);
      }

      if ( ($this->enabled == true) && ((int)MODULE_SHIPPING_FLAT_ZONE > 0) ) {
        $check_flag = false;
        $check = $db->Execute("select zone_id from " . TABLE_ZONES_TO_GEO_ZONES . " where geo_zone_id = '" . MODULE_SHIPPING_FLAT_ZONE . "' and zone_country_id = '" . $order->delivery['country']['id'] . "' order by zone_id");
        while (!$check->EOF) {
          if ($check->fields['zone_id'] < 1) {
            $check_flag = true;
            break;
          } elseif ($check->fields['zone_id'] == $order->delivery['zone_id']) {
            $check_flag = true;
            break;
          }
          $check->MoveNext();
        }

        if ($check_flag == false) {    //this order is international shipping
            // $this->enabled = false;
            
            $this->is_international = true;
            $this->enabled = false;    //12/18/2009, 17:52:43  by Hao to disable flat shipping when international is on
        }
      }
    }

// class methods
    function quote($method = '') {
      global $order;
    
    /*
    rules for shipping cost:
    Domestic:
    1. books or mixed, express, 16.00
    2. books or mixed, common, 13.00
    3. only none books, 5.00
    
    International:
    1. 27.00
    */
      $this->quotes = array('id' => $this->code,
                            'module' => MODULE_SHIPPING_FLAT_TEXT_TITLE
                            );

        $products_type = get_cart_contents_type();    //see this function in extra_datafiles


        if($this->is_international)
          $this->quotes['methods'][] = array('id' => $this->code,
                                         'title' => MODULE_SHIPPING_FLAT_TEXT_INTERNATIONAL_SHIPPING,
                                          'cost' => MODULE_SHIPPING_INTERNATIONAL_COST);
        else{
            if($products_type == CATEGORY_SPECIALS_ONLY)    //only small items and none books
                  $this->quotes['methods'][] = array('id' => $this->code,
                                         'title' => MODULE_SHIPPING_FLAT_TEXT_SMALL_ITEMS_SHIPPING,
                                          'cost' => MODULE_SHIPPING_NONE_BOOKS_SMALL_ITEMS_COST);
            else
            {
                  $this->quotes['methods'][] = array('id' => 'express',
                                         'title' => MODULE_SHIPPING_FLAT_TEXT_AP_EXPRESS_SATCHEL,
                                          'cost' => MODULE_SHIPPING_AUSTRALIA_EXPRESS_POST_COST);

                  $this->quotes['methods'][] = array('id' => 'common',
                                         'title' => MODULE_SHIPPING_FLAT_TEXT_AP_SATCHEL,
                                          'cost' => MODULE_SHIPPING_AUSTRALIA_POST_COST);
            }

        }

      if ($this->tax_class > 0) {
        $this->quotes['tax'] = zen_get_tax_rate($this->tax_class, $order->delivery['country']['id'], $order->delivery['zone_id']);
      }

      if (zen_not_null($this->icon)) $this->quotes['icon'] = zen_image($this->icon, $this->title);

      return $this->quotes;
    }

    function check() {
      global $db;
      if (!isset($this->_check)) {
        $check_query = $db->Execute("select configuration_value from " . TABLE_CONFIGURATION . " where configuration_key = 'MODULE_SHIPPING_FLAT_STATUS'");
        $this->_check = $check_query->RecordCount();
      }
      return $this->_check;
    }

    function install() {
      global $db;
      $db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, set_function, date_added) values ('Enable Flat Shipping', 'MODULE_SHIPPING_FLAT_STATUS', 'True', 'Do you want to offer flat rate shipping?', '6', '0', 'zen_cfg_select_option(array(\'True\', \'False\'), ', now())");
      $db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, date_added) values ('Australia Express Post - Satchel', 'MODULE_SHIPPING_AUSTRALIA_EXPRESS_POST_COST', '16.00', 'The shipping cost for books using this shipping method.', '6', '0', now())");

      $db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, date_added) values ('Australia Post - Satchel', 'MODULE_SHIPPING_AUSTRALIA_POST_COST', '13.00', 'The shipping cost for books using this shipping method.', '6', '0', now())");
      $db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, date_added) values ('Australia Post - Non-books/Small Items', 'MODULE_SHIPPING_NONE_BOOKS_SMALL_ITEMS_COST', '5.00', 'The shipping cost for none books and small items using this shipping method.', '6', '0', now())");
      $db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, date_added) values ('International Shipping Cost', 'MODULE_SHIPPING_INTERNATIONAL_COST', '27.00', 'The shipping cost for all international orders using this shipping method.', '6', '0', now())");

    
      $db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, use_function, set_function, date_added) values ('Tax Class', 'MODULE_SHIPPING_FLAT_TAX_CLASS', '0', 'Use the following tax class on the shipping fee.', '6', '0', 'zen_get_tax_class_title', 'zen_cfg_pull_down_tax_classes(', now())");
      $db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, set_function, date_added) values ('Tax Basis', 'MODULE_SHIPPING_FLAT_TAX_BASIS', 'Shipping', 'On what basis is Shipping Tax calculated. Options are<br />Shipping - Based on customers Shipping Address<br />Billing Based on customers Billing address<br />Store - Based on Store address if Billing/Shipping Zone equals Store zone', '6', '0', 'zen_cfg_select_option(array(\'Shipping\', \'Billing\', \'Store\'), ', now())");
      $db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, use_function, set_function, date_added) values ('Domestic Shipping Zone', 'MODULE_SHIPPING_FLAT_ZONE', '0', 'If a zone is selected, domestic cost will only apply for that zone. All other zones applies international shipping cost.', '6', '0', 'zen_get_zone_class_title', 'zen_cfg_pull_down_zone_classes(', now())");
      $db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, date_added) values ('Sort Order', 'MODULE_SHIPPING_FLAT_SORT_ORDER', '0', 'Sort order of display.', '6', '0', now())");
    }

    function remove() {
      global $db;
      $db->Execute("delete from " . TABLE_CONFIGURATION . " where configuration_key in ('" . implode("', '", $this->keys()) . "')");
    }

    function keys() {
      return array('MODULE_SHIPPING_FLAT_STATUS', 'MODULE_SHIPPING_AUSTRALIA_EXPRESS_POST_COST', 'MODULE_SHIPPING_AUSTRALIA_POST_COST', 'MODULE_SHIPPING_NONE_BOOKS_SMALL_ITEMS_COST', 'MODULE_SHIPPING_INTERNATIONAL_COST', 'MODULE_SHIPPING_FLAT_TAX_CLASS', 'MODULE_SHIPPING_FLAT_TAX_BASIS', 'MODULE_SHIPPING_FLAT_ZONE', 'MODULE_SHIPPING_FLAT_SORT_ORDER');
    }
  }