Dynamic Legend item sort order

This is regarding Robert Scheitlin's Dynamic Legend widget located here. I am using the 3.2 uncompiled version. My operational layers seem to be displaying in no particular order in the widget. I'm sure it's based on something, but right now it seems quite random.

Can anyone explain the logic behind the sorting of items in the Dynamic Legend widget, and how/where I might go about changing or controlling it? I'd really like to have them in the order they are listed in the Map Switcher widget.

Thanks,
Aaron