The sum aggregation is not working properly in build 6.2
TitleQListView calculated field sum aggregating not working in 6.2
CauseThe control that handles this feature is not handling this call correctly.
Upgrade to QuickApps for SharePoint 6.3.
Defect ID TF00313231 has been resolved in QUick Apps for SharePoint 6.3. This release is due out at the end of March 2014.