Site Redesign: Implement & Refine WordPress Theme & Plugins

We are an online continuing education company that sells coursework to students through our website. Currently, upon purchase, students receive a link via email for a downloadable pdf file. The student also receives a link to take their course exam. While exams are graded automatically, we currently send out PDF course completion certificates manually. We currently have issues with consistent emails, the Paypal merchant is undesirable for our customers, and various testing issues. We want a redesigned site. We purchased this WPLMS theme: [login to view URL] and began to implement it ourselves. We ran into an issue when we realized that this Learning Management System may not automatically give certificates either! It seemed like it did in the Live Preview. In reality, this theme may do everything we want it to but our abilities have officially been exceeded by this project. Our new website priorities are: 1. Site must have improved automation to reduce administrative responsibility. Everyday, I log into my website and check to see if students have taken and passed any exams. If they have, I have to fill out certificates, one by one, save as PDF files, and send them to each student manually via email. I do not want to do this anymore as it's entirely too time consuming. I need an automated system that, once the student passes his/her test, will fill that student's information on it and send it via email to that student immediately. If this cannot be done, then I need a LMS system that will guide the student to a certificate (once they pass their exam), and allow them to print or email it to themselves. Our current downloads plugin, Easy Digital Downloads, was supposed to be automated to work with pdf generator, DocRaptor, but when it came time to implement, it was clear that we couldn't make it happen. 2. Site should be redesigned to be more attractive to users. I need an LMS theme that looks good and runs efficiently on smartphones and tablets. 3. Site should have an improved checkout experience. Too often, there is an interruption between my website and my merchant account (PayPal). When this happens, my students are not automatically sent an email with their course materials and links because the payment hasn't been processed. I really don't know if this interruption is happening on PayPal's end or on my website, but there should be no interruption between the website and merchant account, at least on my end. So maybe I need a more efficient system? 4. Tests should be able to be saved and returned to at a later time to finish. This doesn't happen too often, but occasionally a student needs to log out of a test and then log back in later. My current system does not allow a student to pick up where he/she left off, so he/she will need to start the test over upon logging in again. It's not a big deal until the student freaks out. If there is an LMS system with a superb online testing application, that would be nice. 5. Site should have improved graphics/interaction. On my home page, I have a map of the USA that potential students can click on to see their state's continuing education requirements. It doesn't work with Safari, which isn't a good thing. So I guess, what I'm saying is, I need a website that works with pretty much every browser out there: Firefox, Chrome, Safari, etc. See the map in question on our home page: [login to view URL] 6. Site should allow for multiple instructors. In the future, we'd like to allow other instructors to post their coursework to our website and sell courses. When this happens, we'd like to keep a percentage of the sale and then give the rest to the, automatically. The website should allow for multiple instructors to moderate their courses and receive a determined percentage of the sale price of the course. The theme we purchased has these capabilities, we just need it implemented.