Of course, this just means it's what I had to do to get the 3-column behavior advertised in the preview screenshot and template description, obviously there are no "objectively correct" settings for the sidebox setup. I guess the important takeaway here is that for some reason, on a fresh install, ZCA defaults to having no sideboxes enabled at all, even when the standard themes have sideboxes enabled. I am not sure why this is or if it is expected behavior, it's just what i experienced, you know?