I found this post http://forums.infragistics.com/forums/p/2886/16839.aspx#16839 which is exactly what I am trying to accomplish and Max's code there works great for making 2 groups of stacked bar charts, but how do you add more? 

I thought you would just add another layer, 2 more series, and another group label all with similar attributes as the ones already created.  But that doesn't seem to work for me, the 2 new series end up being drawn overlapping one group of the other series.  

One poster in that thread was able to do something similar to what I am looking to do but he didn't post any code on how he did it.