Hello I currently have a custom module which calls a submit custom validation function, I am trying to update a value after the validation is run. Basically, if a value is present, update a field to say "Yes"

    function sitefuncs_form_alter(&$form, &$form_state, $form_id){
     
    if( $form_id == 'stage_2_node_form') {
       $form['actions']['submit']['#submit'][] = 'sitefuncs_custom_submit';
    }
     
    } // end hook_form_alter()
     
    function sitefuncs_custom_submit($form, &$form_state) {
     
            $banned = array(
            'better cures',
            'better nhs',
            'because it',
            'so what'
            );
     
      if (in_array($form_state['values']['field_stage_two_question_one']['und'][0]['value'], $banned)) { // if a banned word is the value of the input
     
    $form_state['values']['field_stage_complete_text']['und'][0]['value'] = "No"; // set the value of the text input to No
     
    } else {
     
    $form_state['values']['field_stage_complete_text']['und'][0]['value'] = "Yes";
     
    $messages = drupal_get_messages('status');
    drupal_set_message(t('Your changes have been saved.'));
     
    }
     
    }

If anyone has any ideas why the $form_state isn't updating the fields after I save the node, any help would be great!

Thanks,
Garry.