Ctools multistep returning user
you need to save your signup object in MYMODULE_registration_subtask_next

like:

&lt;?php    
    function MYMODULE_registration_subtask_next (&amp;$form_state) {
      MYMODULE_registration_set_page_cache('signup', $form_state['signup_object']);
    }


and - in MYMODULE_registration_subtask_cancel and MYMODULE_registration_subtask_finish you should clean that cache, like MYMODULE_registration_remove_page_cache('signup');