beta & dev > User1 added Private asset from CB > User 2 able to View that private asset

User1 > My Collection > Added a Public Collection
Click Edit link.
In CB> Build Up > Add a PRIVATE asset.

Now login as user2
View the Public Collection that user1 has created.
In the view mode, in TOC, the Private asset of user1 is displayed.

[ If user1 has added a Private asset from Build Up of my collection or build up of my collection in View mode, then that Private collection will not be viewable by other users ]

This issue is in dev site & beta site.

http://staging.curriki.org/xwiki/bin/view/Coll_ashpee/GUIDS

TOC >Curriki Private is an asset that I have added from CB. Other private asssets that I have are not visible by others.