Thank you very much for your kind words!
I'm afraid this is not possible, at least not without major modifications to the core plugin code. I have tried to maybe construct some custom CSS to somehow force column layouts from the same taxonomy items, but it's not working out in any ways.
The problem is that the plugin for now is only capable of separating terms from distinctive taxonomies. So items within the same taxonomy are placed into one fieldset. This would only work if the categories were separated into different taxonomies.
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