Hi warren,
Take a look at the general options under s2member where it says 'Login Welcome Page'. Here is what it says there:
"
Allow Free Subscribers Access To This Page?
If you set this to Yes, it means that you're giving Free Subscribers the ability to access this special Page that is normally intended only for Members. If you set this to Yes, you're also turning on the `Anyone Can Register` option that is built into WordPress®. So what this means, is that you're allowing people to signup for free, as a Free Subscriber, who will then have access to the Login Welcome Page, even though they're NOT a paid Member. This is only useful if you plan to let Users signup for free (
http://YOURURL/wp-login.php?action=register ). See s2Member -> API Scripting -> Advanced Conditionals, for details on how to customize your Login Welcome Page with Conditionals; based on Membership Level.
"
To me, it sounds like you need to work with the conditionals. I don't know if this would work, but you might also try setting the price for option 1 to $0.00.