[Zope] record count in catalog

Hi all, The Catalog tab in my catalog says this: The catalog "mycatalog" contains 30,345 record(s) in the path "/". But when I sort and return a list of cataloged objects I only have 19,881. Here is the script call to retrieve the records: context.mycatalog.search( {}, sort_index='lastname' ) Why don't the numbers match up? -d