Unloading a SolrCore object and specifying delete does not fully delete all Solr parts

If I issue a action=UNLOAD&delete=true request for a specific Solr Core on the CoreAdminHandler, all files are removed except files located in the tlog directory under the core. We are trying to manage our cores from an outside system, so having the core not actually get deleted is a pain.

I would expect all files as well as the Core directory to be removed if the delete parameter is specified.