SQL Reporting :: Get Rid Of Repeating Label Of Column Field On Expand?

I have a Reportviewer displaying a matrix table. It has a column field called Country and 2nd/sub Col called City and with drill down activitied

On the report, when I expand Country, the Cities are exposed/expanded which is great but the problem is the header for columns now look like this:-

USA
================
Seattle, Washington DC, etc
================
USA, USA, USA, USA
================

So the "USA" is repeating on the header. I dunno how to remove the bottommost row of the header which is undesirable.