The normal function of the YF about Default Dashboard Tabs, it works only for user has login the first time only. If you add a new dashboard after user first login. The user must adding dashboard by oneself go to Create menu-->Dashboard Tab and Adding a Pre-Built Tab.
But I must apologize. Yesterday, the server is very slow. We may have get some problem that is unlikely to happen after import.
So, I decided to delete all dashboards because otherwise we will have to spend more time in the deployed.
Also, I'm not sure another users will be able to can see all dashboards or not. We may be adding all dashboards(HSB) again. So sorry.