Recieved a reply to my email today:
I checked the site, my 4 dvd's have been recieved, and nothing is being sent out. So i have to wait til the 2nd of May.
They've also changed the details on their website, it used to be something along the lines of as soon as we recieve your discs back, we'll post the next disc on your list IMMEDIATELY... now it says...
They must be having major problems, too many people signing up, not enough staff and time to handle it.