Membership Levels

Howdy, so I've set up a 'consultant' and a 'free' level on my membership plugin. I'm having a hard time with Free vs. Visitor to the site. To me they sound like the same but i'm not getting the results I need.

If a stranger visits my site I want them to see the Home page and other pages and have the option to log on/register for the site but it's automaticall sending them to the Access Denied page. I've set up a Visitor Level, and a Free level but it seems like the rules are not being followed when I test it.