Getting Membership to show correct pages

I'm trying to setup Membership and struggling a bit with showing the correct content.

I want to create a closed membership site for an alumni club, where I create / modify users. I have two levels set up: Visitors and Members, and Members should be able to access the pages under the 'Member's Area' menu item. Visitors get the protected content page.

What's happening is that on a protected content page, both levels are getting the list of subscriptions available, which in this case is none (as there's no upgrade path available to them - I should be the only one controlling it).

Any ideas on how to fix this?

Cheers,
Rog