Titles not showing for tabs pages

Below is the array in my hook_menu

The only issue that I have with it is that the titles are not displaying for tabs pages (the last three array collections).

They are showing the title for the parent: ‘Affiliate Hoover Home page’.

I’ve tried title callback instead but that isn’t working

$items['admin/config/affiliate_hoover'] = array(
    'title' => 'Affiliate Hoover Home page',
    'page callback' => 'drupal_get_form',
    'description' => 'This is the affiliate hoover homepage - add shit here',
    'access arguments' => array('access content'),
    'page arguments' => array('affiliate_hoover_first_form'),
    'file' => 'affiliate_hoover.home.inc',
    'menu_name' => 'Affiliate Hoover',
    'type' => MENU_NORMAL_ITEM,
    );

$items['admin/config/affiliate_hoover/uniquename/%'] = array(
    'page callback' => 'affiliate_hoover_unique_name',
    'access arguments' => array('access content'),
    'page arguments' => array(4),
    'file' => 'affiliate_hoover.uniquename.inc',
    'type' => MENU_VISIBLE_IN_BREADCRUMB,
    'title callback' => 'affiliate_hoover_uniquename_title_callback',
    'title arguments' => array(4),
    );

$items['admin/config/affiliate_hoover/uniqueform/%'] = array(
    'page callback' => 'affiliate_hoover_unique_form',
    'access arguments' => array('access content'),
    'page arguments' => array(4),
    'file' => 'affiliate_hoover.uniqueform.inc',
    'type' => MENU_VISIBLE_IN_BREADCRUMB,
    'title callback' => 'affiliate_hoover_unique_form_title_callback',
    'title arguments' => array(4),
    );

$items['admin/config/affiliate_hoover/ajax'] = array(
    'type' => MENU_CALLBACK,
    'file' => 'affiliate_hoover.ajax.inc',
    'page callback' => 'affiliate_hoover_ajax_callback',
    'access arguments' => array('access content'),
    );

$items['admin/config/affiliate_hoover/'] = array(
    'title' => 'Home',
    'type' => MENU_LOCAL_TASK,
    'access callback' => TRUE,
    'weight' => -10);

$items['admin/config/affiliate_hoover/delete'] = array(
    'title' => 'Delete',
    'type' => MENU_LOCAL_TASK,
    'file' => 'affiliate_hoover.delete.inc',
    'page callback' => 'affiliate_hoover_delete_page',
    'access callback' => TRUE,
    );

$items['admin/config/affiliate_hoover/log'] = array(
    'title' => 'Log',
    'type' => MENU_LOCAL_TASK,
    'file' => 'affiliate_hoover.log.inc',
    'page callback' => 'affiliate_hoover_log_page',
    'access callback' => TRUE,
    );

$items['admin/config/affiliate_hoover/tracking'] = array(
    'title' => 'Tracking',
    'type' => MENU_LOCAL_TASK,
    'file' => 'affiliate_hoover.tracking.inc',
    'page callback' => 'affiliate_hoover_tracking_page',
    'access callback' => TRUE,
    );

return $items;

drupal_set_title($title = NULL, $output = CHECK_PLAIN);