Hi. Set the script up on my server without any problems, was simple

Set the emails up, simple.
I have my settings so that the paypal payment is non-recurring.
Did a live purchase to see what a customer would see. All good. Although I do not like the page they see after a successful payment: They are returned to the signup page? I can live with this, but why not a "Payment Successful Page"?
The customer receives a very confusing email though, titled:"Your campaign has expired" ?
Then a few seconds later they get:"Your campaign is now active"?
This is going to be a support nightmare for me. How do I fix this?
Any timely help would be appreciated.
Susan