geoip + sistats does not seem to populate my summary index

I'm attempting to populate a summary index with results based on this search: sourcetype=release-log OR sourcetype=selector-web | localop | geoip client_ip | sistats count AS TotalRequests BY client_ip_countryname

the non "sistats" version of this search does return valid results. "client_ip" is a search time field extraction and client_ip_countryname is generated by the output of geoip.

when i schedule the search above to populate the summary index using "sistats", the saved search statuses claim that each run is returning about 9000 results. However, when i try to search against at the summary index none of the results appear to have been stored in the index. I have two other summary index populating searches working (though they use sitimechart, not sistats) so I know my index itself is ok. any ideas on what could be wrong?