Would like to add my own 'Exit' tab to a pageroute

It appears pageroute_show_route is firing even though I set the callback of my menu item to drupal_goto. Any ideas why? Is my item being unset somewhere after I set it?

The following is the code I added to my module:

 if (is_numeric(arg(2)) && is_numeric(arg(3))) {
      //this isn't working. pageroute is thwarting this - I had to patch pageroute and this still doesn't work - the callback never fires.
      $edit_user = user_load(array('uid' => arg(3)));
      $membership_type = $edit_user->mem_choice;
      $mem_pageroutes = _nf_registration_mod_get_added();
      $all_routes = _nf_registration_mod_get_pageroutes();
      $user_route = $all_routes[$mem_pageroutes[$membership_type]];
      if (arg(0) == $user_route) {
        $return_path = 'user/'. arg(3) .'/edit';
        global $_SESSION;
        $_SESSION['myarg'] = arg(3);
        $items[] = array(
          'path' => $user_route .'/return',
          'title' => t('Back to "My account"'),
          'callback' => 'drupal_goto',
          'callback arguments' => array($return_path),
          'access' => $admin_access || $user_access3,
          'type' => MENU_LOCAL_TASK,
          'weight' => 100,
          );
      }
    }

As the note indicates, it doesn't work the normal way, so I inserted a session variable called myarg. My arg is checked here:

 /*
 * Shows the given route
 */
function pageroute_show_route(&$route) {
  global $page;
  if (arg(0) == $route->path && arg(1) == 'return') {
    global $_SESSION;
    $myarg = $_SESSION['myarg'];
    drupal_goto('user/'. $myarg .'/edit');
  }
  //if menu tabs are used, the route has already been initialized
  if ($route->options['tabs'] != PAGEROUTE_MENU_TABS) {
    $page_name = _pageroute_init_route($route);
  }
...

This is, of course, a hack to your module to get this to work. And it does work just fine. The problem is that it shouldn't be necessary and I haven't been able to figure out the problem - i.e. the callback from the menu item itself never fires. In fact, I can put anything in there and nothing happens. Also, this naturally won't show up if using buttons for tabs, so now I only have next/prev/submit at the bottom to save the contents of the node.

This is for the http://drupal.org/project/nf_registration_mod module, but this code has not been released since I'm not yet sure of its stability. Side note: weight of the modules didn't seem to do anything. If you'd like to play with my module, I could zip the current version and post it here. It allows you to have several different membership types, each with its own pageroute. There can be pages in common and unique pages to each route. I can't use your user edit integration because it looks for nodeprofile types in general, and not for a pageroute associated with a user, so I implemented that myself originally. I'm sure you saw my other post about not being able to save content when edited from the node directly. I'll comment more about this over there: http://drupal.org/node/177874