Global Config>Site Index>Forum Profile URL>Help note - what does this note mean?
Design and Skin Customization
Yes.
What you're seeing here is the pains of flexibility.
traditionally the way to build a skin is to add some config options to collect the desires of the admin, then use those settings to turn on/off sections of the skin.
Site Builder was a method added later that allows the admin user to directly turn on/off sections of the skin without the need to adjust the code.
The config options are still visible in the skin, but Site Builder has taken over as the primary method, so the config options have nowhere to effect. The variables that are set by those config areas still exist waiting to be used, but unless you ARE using them somewhere, they will have no visible effect.