Small bug: drupal_get_form() parameter and node type definition in module

I made this tiny module that defines a new 'bean' node type. I made a form for it. Now I am trying to provide an additional path to return the form html. But it does not call the hook_form() with the right parameters, in fact, the parameters seem to be reversed.

Anyone see the problem in this code? Why are the parameters to hook_form() reversed depending on whether I am adding it using node/add/bean or pulling it through drupal_get_form() ?

Thanks!

Code:

function coolbeans_menu()
{
  $items = array();
  $items['ajaxbean'] = array(
    'title' => '',
    'page callback' => 'coolbeans_ajax',
    'access arguments' => user_access('create content'),
  );
  return $items;
}

function coolbeans_ajax()
{
    if (!isset($_GET['nid'])) { echo "Missing nid"; die(); }
    $node = node_load($_GET['nid']);
    echo htmlentities(drupal_get_form("coolbeans_form", $node));
    exit;
}

function coolbeans_node_info()
{
  return array(
    'bean' => array(
      'name' => t('Bean'),
      'module' => 'coolbeans',
      'description' => t("A bean is a small thing."),
      'help' => t("How can I help you?"),
      'has_body' => FALSE,
      'has_title' => FALSE,
    ),
    );
}

function coolbeans_form($param1, $param2)
{
    /**
     * When I access /node/add/bean
     *       param1 is the node, param2 is the form_state.
     * When I access /ajaxbean?nid=69
     *       param1 is the form_state, param2 is the node.
     * Why are these two reversed?
    */
    var_dump($param1);
    var_dump($param2);
    $form = array();
    $form['bean'] = array(
        '#type' => 'textfield',
        '#title' => 'Bean',
        );
    return $form;
}