I have two data series, one for 'this month' and one for 'year to date'. I am plotting these in a clustered column type graph. I am try to plot the 'year to date' series on a secondary axis but whenever I select the series and use 'format data deries' 'axis' 'plot series on - secondary axis' the graph converts to a stacked column. I am using Excel 2003 via a thin client to Windows server 2003.