I am experiencing this issue as well with the alerts returning 0 values.  We will probably log a client care ticket.  

I was working on a traffic report with a breakdown of another prop.  The top entry in the breakdown was unspecified.  When I moved the data into Workspace, the unspecified data was not there.   I wanted to break the unspecified data down by an eVar in workspace to find the problem.  See attached ima...