Product Kit: products not sorted properly

Attached screenshot has the help text for the "List Position" field (aka ordering column in the db), which claims that an alphabetical sort will be used as backup.

When showing a list of products in a product kit, the following relevant functions are used. The initial query is clear only sorted by the list position, and the uasort callback does the same.

function uc_product_kit_load(&$node) {
  ...
  $result = db_query("SELECT product_id, mutable, qty, discount, ordering, synchronized FROM {uc_product_kits} WHERE vid = %d ORDER BY ordering", $node->vid);
  ...
  uasort($products, '_uc_product_kit_sort_products');
  $obj->products = $products;
  ...
  return $obj;  
}

function _uc_product_kit_sort_products($a, $b) {
  if ($a->ordering == $b->ordering) {
    return 0;
  }
  else {
    return ($a->ordering < $b->ordering) ? -1 : 1;
  }
}