Clearer Payment/Registration Process?

I’m using the Membership plugin on a site (http://bit.ly/1DmzuVJ) where users register to gain access to members-only Pages. I am using Paypal recurring payments.

The problem is that the registration and payment happen in two separate steps. I have had about 10 customers since launch, and only about 1/3rd of them submit their payment through Paypal after registering. They close the window and think they are done, and I have to follow up with them manually and send them instructions to start again… or they get confused when being redirected to login at Paypal.

There is only one membership level on my site.. is there a way to have the WordPress registration and payment happen in the same form / same step? Can I use plugins or something, or should I be switching to something better than the Membership plugin?

Thanks in advance!