Wunderbar customization - New Area


I have been trying to add a new area in wunderbar (workplace,sales,marketing..) using Sitemap editor provided by Microsoft Dynamics. Well, it created new areas but the name doesn't seem to reflect. It is shown as "Unknown x" and x is not constant but increases whenever I customize.

This is kind of weird to see and also distinguish. Can anyone help me out of this?

link to screenshot is http://picpaste.com/ms_dynamics-fOiNKH9G.JPG

Thanks !