John, you are part right.

A cookie is sent to the site/server, eg. if you were to visit the Annexe, your machine would send me the cookies assosciated with jonbanjo.com and not any other site.

Help and this 99 backdoor are actually the same machine at the moment. www is a different server.

The situation with the help forum is different though. The base of Mudcat was a Cold Fusion tutorial program and help pretty much reflects that old program. It doesn't cater for things like members that were later additions produced by Max/Mudcat.