Hello,
I have not configured any custom structures. I followed you documentation exactly. All I did was go to Attributes>Brands>Configure Terms, and added a couple brands. I then went and assigned those Brands to my products.
I did not create all of the other ones like Alessi, Eva Solo, Flos, Klober, etc, etc, Those were brought in from your Theme, and those Ones do not work either. They go to a 404 page. I have not modified anything. Just created the Brands like your documentation shows. So there must be a THeme issue. Please advise on how to get this to work properly.