Have a coupon code confusing on registration

Hello All,

I am just getting started with Membership. The registration process as it relates to coupon codes is confusing.

We're running WordPress 3.6.1 and BuddyPress 1.8.1

I have Membership configured with one Subscription, Standard and no coupon codes.

After a member registers they are directed to a page that says "Sign up for Standard" and then a box that says, "Please check the details of your subscription below and click on the relevant button to complete the subscription.
Standard Free
You will pay: Free
Have a coupon code? - Apply Coupon

At this point in time the user is already logged into the site. The Apply Coupon button is confusing. If it is clicked with the coupon field blank the page simply refreshes.

Is there any way to turn coupon code off, either manually or if there are no coupons?

Ideally I would like new users to be redirect to a specific new user page.