customizing register page

When I go to http://paleoradioactive.us/register/ because I am logged in, I see an (edit page) link. So I attempt to edit the page, and publish. But the result is the same as what was in there before, light grey text which reads “We have the following subscriptions available for our site. To join, simply click on the Sign Up button and then complete the registration details.”

It’d be nice to not have a separate page with explanation of member benefits then this page then the actual page with paypal button then paypal… it is just too many steps. I’d like to know how to edit the register page successfully.