Classified confused :-)

So I've setup multisite, added classifieds but things don't seem to be "right"
Each user blog has a page "checkout" that says disabled by system administrator... is this part of classifieds?

I've read through the instructions a number of times and now with 3.1 you have to guess what is part of network admin and what is site admin.

I found Classifieds under Site Admin and setup the credits, amount and PayPal API.
When I click Credits I have 0 and can purchase... but I'm the site admin???

If I go to a client site (non-supporter) there's no option about credits etc..

Really classifieds has no connection to supporter correct?