sorting legend same as stacked column chart

I have a stacked column chart showing number of tickets per month/year, and the "stacked" part splits into ticket categories:

As you can see, the columns build up from the bottom, alphabetically by Category.  However, the legend shows the exact opposite.  I may be missing something simple, but how can I get the stacks and the legend to line up in the same order (without turning it into a horizontal stacked bar instead of stacked column) ?

Thanks,

David