[springjack]

Got the reply:

I understand what you're saying, we have indeed replaced the master but at the time the discs were printed the factory hadn't even received the master so we did this to get the discs printed faster but also in the packaging
stages so faulty stock and corrected stock of discs did not get mixed up,
which is what happened when we first corrected the disc.

I understand that DVD-Rs have a shorter shelf life and I can put a copy aside for you when they are printed but this won’t be for a while so if you can use the DVD-R we have sent you til then I will make sure a copy comes your way when printed.