Hey, thanks for the report! I will change the tooltip a little bit for the next version.
The smart loading setup is a little confusing. Normally it only works when you set an item next to the "use filter inserters?" without actually using filter inserters, so like this: http://i.imgur.com/sK0zJ7D.png
However, your post made me think if I could implement without having to set any resource type and it will use the "everything" signal instead. I will try to implement it but can't promise that I'll succeed.
Edit: Ok I've implemented it for the next version.