Issues with Membership set up

I have set up the Membership plugin for a WPMU site (picksmarket.com). Now I am testing it at PremiumTipsters.com and I am having a big issue.
I set up some Access Levels based con each category.
I set up some Subscriptions Plans based on those access levels.
And I have some subscribers, all of them on the same Plan.
The issue is that they have access to all the set up Plans, not only to the one the are subscribed.
I would really love to give you guys Admin, just for you to check what's wrong.
Could that be possible?
Thanks!