Drupal Website - Upgrade of Website which needs assistance and fix of small bug

Hi, I have this website built for a client [login to view URL] and looking for a company with expertise in development It was upgraded from [login to view URL] The ORIGINAL website use to charge $20 per client for a year and they had access to PAID study notes. There was also FREE Study notes for NON paid users that any user can access and download. The new website makes users sign up via the users email or via their FACEBOOK to access the FREE Study notes now to build membership and does NOT charge the user anything. This gives them access to a dashboard and access to the Limited Pages. FREE users can now "BECOME A PAID MEMBER" and go through the registration process. PAID MEMBERS have a dashboard also but have access to ALL Study Notes (Access to a secure memberszone pages) The PAID MEMBERS doesn't charge $20 a month anymore, it charges Monthly Recurring Fees at different prices. THIS WORKS FINE UP TO HERE ISSUES THAT NEED ATTENTION 1. the Original Website, sent the user an email after they paid with a LOGIN PASSWORD. I would like to remove that feature and add 2 PASSWORD Fields (email & confirm) to the registration/checkout page. - [login to view URL] 2. When a user from FREE to PAID has successfully paid for the membership, the need access to the MEMBERZONE Pages (the PAID MEMBERS Dashboard). We need this to automatically change the ROLE of the users after successful payment 3. There is a small BUG if a user has 2 membership packages in their cart and tried to remove one. It plays up and says the shopping cart is empty. I have attached some screenshots Please let me know EXAMPLES of Drupal work Time Frame