So another SOQLbuilder question - why is SUM(Total_USD_Gross__c) the only field in the output SQL ?

companyquery = new SoqlBuilder()
                .selectx('Event_to_Deal__r.Client_Company__r.ID')
                .selectx('Event_to_Deal__r.Client_Company__r.Name')
                .selectsumx('Total_USD_Net__c')
                .selectsumx('Total_USD_Gross__c')
                .fromx('Event_Costs__c')
                .wherex(new SetCondition('Event_to_Deal__r.Client_Company__r.ID').inx(comps))
                .groupByx('Event_to_Deal__r.Client_Company__r.ID')
                .toSOQL();

  which yields the following SOQL

SELECT SUM(Total_USD_Gross__c) FROM Event_Costs__c WHERE Event_to_Deal__r.Client_Company__r.ID IN ('a0220000004aPRAAA2','a0220000006Fb7CAAS','a0220000004ZaYxAAK') GROUP BY Event_to_Deal__r.Client_Company__r.ID

Where are ID, Name and the other SUM ?  The following manual SOQL works, and is the kind of thing I'm expecting SOQLbuilder to construct

SELECT Event_to_Deal__r.Client_Company__r.ID,Event_to_Deal__r.Client_Company__r.Name,SUM(Total_USD_Gross__c) Gross, SUM(total_USD_Net__c) Net FROM Event_Costs__c WHERE Event_to_Deal__r.Client_Company__r.ID IN ('a0220000004aPRAAA2','a0220000006Fb7CAAS','a0220000004ZaYxAAK') GROUP BY Event_to_Deal__r.Client_Company__r.ID,Event_to_Deal__r.Client_Company__r.Name