Re: Prejudice?
I'd say it sucks but it's entirely the fault of the lawyers (or their minions) who mucked it up. That's the documentation they presented to the courts, it was their duty & professional responsibility to ensure that it was redacted properly.
As for the point of redaction, again not a lawyer but happy to be corrected, it's not about prejudice it's about controlling the information your opponent sees. They ask for all information concerning X,Y & Z, there's some pre-trial 'negotiating' about what is & isn't relevant and the court orders them to hand over the X & Z information. If they foolishly include Y in the information packet, that's on them. If their opponent doesn't ask for A & B (which is where the juicy stuff is) that's the opponents problem, they're not under any obligation to hand it over or even mention its existence