Trying to setup Subscription with a Free Trial


We have trouble to setup and understand the flow for a Membership 2 PRO Subscription with a FREE Trial period.

Basically, after user selects a subscription and register an account he gets the following message Please check the details of the membership below and click on the relevant button to complete the signup. and he can see the "Signup" button - see the attached screen shot.

What confuses us, user is asked to signup again. Although, as per our understanding, user already signed up for a subscription by selecting it before registering his account.

Unlike from the Subscription with a Free Trial a Subscription with no Trial period is working fine, just after registering, user is sent to a PayPal website for a payment.