Facet block only displays 1 item

On a search view I have two facet blocks, and both only display 1 item to filter the list. Changing settings on the facet does not make any difference.

If I look at the database table (search_api_db_kaufindex) there are 18 elements with the taxonomy term "71", 3 with the term "72" and 3 with the term "73". But the facet block only lists the term with id "71" as possible link to filter the view. The view, when not filtered, displays all 24 nodes.

This happens whether I use the stable 7.x-1.11 or the latest dev (2014-May-15).

This is the facet configuration:

$facet = new stdClass();
$facet->disabled = FALSE; /* Edit this to true to make a default facet disabled initially */
$facet->api_version = 1;
$facet->name = 'search_api@kaufindex:block:field_category';
$facet->searcher = 'search_api@kaufindex';
$facet->realm = 'block';
$facet->facet = 'field_category';
$facet->enabled = TRUE;
$facet->settings = array(
  'weight' => 0,
  'widget' => 'facetapi_links',
  'filters' => array(
    'active_items' => array(
      'status' => 0,
      'weight' => '-50',
    ),
    'current_depth' => array(
      'status' => 0,
      'weight' => '-49',
    ),
  ),
  'active_sorts' => array(
    'active' => 'active',
    'count' => 'count',
    'display' => 'display',
    'indexed' => 0,
  ),
  'sort_weight' => array(
    'active' => '-50',
    'count' => '-49',
    'display' => '-48',
    'indexed' => '0',
  ),
  'sort_order' => array(
    'active' => '3',
    'count' => '3',
    'display' => '4',
    'indexed' => '4',
  ),
  'empty_behavior' => 'none',
  'soft_limit' => '50',
  'nofollow' => 1,
  'show_expanded' => 1,
  'ranges' => '',
  'default_option_label' => '',
  'submit_page' => '',
  'keep_open' => 0,
  'expand' => 1,
  'collapsible_children' => 0,
  'empty_text' => array(
    'value' => '',
    'format' => 'filtered_html',
  ),
  'submit_realm' => 'Save and go back to realm settings',
);