Sort not working on bubble Chart 10.2.2

[bonniehsueh]

Hi All,
I am trying to sort a bubble chart. Chart is a standard RS chart.

For example, I want to sort Product category by Margin. The series is Product Category. Y axis is Margin. I set the sort on the Series chart node.  I also tried setting the properties on the chart node on the data item even though I'm already showing the data item on the chart. Nothing changes. Any idea what I'm missing?

Thanks in advance!