I have printed off my tickets, just as backup, in case I can't bring them up on my phone, on the day.
When I go back into Railplanner, and bring up the tickets again, they are a different barcode.
Does it matter?
Tickets
A screenshot or a printed code is not considered to be a valid ticket.
If it would be a valid ticket, you could e.g. buy a 4 day in a month pass, generate a code for each day, cancel it (which is possible before the travel day does start) and travel on 30 days instead of 4.
Reply
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.