Creating a new non-primary webform doesn't redirect to components on node save

I created a a custom webform and noticed that when I submitted it on the node page, it did not redirect to node/%nid/webform/components like the webform content type that ships with the module does.

So I started digging and found this in webform.module:

/**
 * Implements hook_form_alter().
 */
function webform_form_alter(&$form, $form_state, $form_id) {
  $matches = array();
  if (isset($form['#node']->type) && $form_id == $form['#node']->type . '_node_form' && in_array($form['#node']->type, webform_variable_get('webform_node_types'))) {
    $node = $form['#node'];
    // Preserve all Webform options currently set on the node.
    $form['webform'] = array(
      '#type' => 'value',
      '#value' => $node->webform,
    );

    // If a new node, redirect the user to the components form after save.
    if (empty($node->nid) && in_array($node->type, webform_variable_get('webform_node_types_primary'))) {
      $form['actions']['submit']['#submit'][] = 'webform_form_submit';
    }
  }
}

The real issue is this conditional:

in_array($node->type, webform_variable_get('webform_node_types_primary'))

I looked in the database, and there's no entry in the variables table for webform_node_types_primary. So I dug further and found that it defaults to just 'webform'. There is no place in the code that does a variable_set for this value, so the value will always be just 'webform'.

Is this by design, or should this conditional instead be using webform_variable_get('webform_node_types'), so that it will perform this redirect for any type of webform content that the user has set up?