membership plugin

I have installed Membership plugin on the above site.

The structure of the site will initially be Member - See everything (no charge) Visitor - (No Access at all even home page)
eventually we will also have a Premium Membership for certain content but just want to get Member Access All and Visitor Access nothing working.

I have setup to membership levels as per above and added positive and negative rules for each. Basically I can still accees the site when I am not logged in. Not sure if I am pushing the boundaries of this plugin by making the whole site available to members and nothing to visitors? I hope not?
*edited to protect user*
Cheers Gavin