Drill Down Not properly working in AddHoc view for Parent Child Hierarchy

For Parent Child Hierarchy Add-Hoc view is not showing appropriate drill down. It is working fine with OLAP view but same functionality is working wierd in add-Hoc view. This is in reference to the HR Cube of employe supervisor Hierarchy. Apparently it looks fine but the drill down, while clicking on '+'  arrows doesn't work fine. Kindly guide how to achive the same functionality in Add-Hoc as provided in OLAP View

I have attached the Ad-Hoc view of the Cube