Step chart with missing data points doesn't render correctly

[snagane]

Hello

I am creating a chart in which I have 2 series(one for values and one for gold targets). For displaying values I have used bar chart and for displaying gold targets I have used step chart. I am assinging data to the chart after doing some manipulation on the data which is retrieved from the database. Now in this particular scenario I have missing data point(for gold target series) for the month of March-2011 so chart is not showing the step for that month which is a default behaviour but in addition to that it also doesn't show the step for month of Feb-2011 even though I have data point for the month of Feb-2011. Please have a look at chart.jpeg file in the attached zip folder.

So whenever I have missing data point(for gold target series) for a particular month then chart doesn't display steps for that month as well as its previous month also. Is this a bug with ChartFx or am I doing something wrong?

I have attached the C# code file(default.aspx.cs) as well as the xml file(data.xml) containing the data for the chart which I am reading into the .Net DataSet and then assigning to the chart's DataSource property.

 Thanks