"Unmapped fields" never shows in sf_node and sf_user

In sf_node, we have this bit of code:

    // Create a table for the unmapped fields.
    $header = array(t('Field name'), t('Salesforce @type value', array('@type' => salesforce_api_fieldmap_object_label('salesforce', $map->salesforce))));
    $rows = array();

    foreach ((array) $sf_data as $key => $value) {
      if (!isset($map->fields[$key]) && isset($object['fields'][$key])) {
        $rows[] = array(
          $object['fields'][$key]['label'],
          $value,
        );
      }
    }

$object does not exist. The proper variable name is $sf_object_definition. Because of this, all fields appear to be mapped.

sf_user looks to be fine.