Hypothetical question... Say tomorrow's sale is an absolute disaster for SeeTickets new system (Oasis esque issues) do they have enough time / an alternative they can pivot to in time for Sunday's sale? Or do they just go into Sunday knowing the system will break again.
Sorry, but that's flat out incorrect and I have to assume you're deliberately trying to trip people up. I have copies of the pages from a couple years ago saved, so I'm not going from memory here:
You can see that drop down for the Departure Point comes after the reg details are already "locked in", which wouldn't be possible if it worked the way you're suggesting.
Sziget would definitely make a post about lineup annoucment. Every festival does that, they aren't just gonna announce names without first teasing about it