Custom layouts not working right?

It may be that I am missing the obvious, but I can't seem to get the custom layouts to work properly.

I go into KERNEL > THEMES > MANAGE LAYOUTS

I have the Site Default layout, which I can make changes to, and that replicates just fine throughout the site. But when I add a custom layout for say, boards or articles, it always shows the Site Default layout instead.

Still not actually sure what "Package Menu" does ... I thought it would show a menu in context with the current page, but it always shows the "Wiki" options on every page.

Thanks in advance for any insights!

When you first make a custom layout it asks you if you want to clone a layout. If you do it will look exactly like that. Once you start adding different modules to your layout it will look different on the given package pages. So if you make a custom layout with unique module assignments for boards, then the boards pages layouts will look different.