ACCOUNTID cannot be retrieved from getSearchRecords

ACCOUNTID cannot be retrieved from getSearchRecords

I am using the getSearchRecords method on Contacts to get contact data. If I set selectColumns to All I get all data fields including ACCOUNTID and SMOWNERID. However, if I set selectColumns to (CONTACTID,ACCOUNTID,SMOWNERID) I get neither ACCOUNTID nor SMOWNERID data fields. Is this a bug?