User blog comment:Zephyrcoil/RWBY Volume 2: Commentaries and Other Information/@comment-11188061-20141127110333/@comment-10380701-20141128001255

Good thing I don't watch the afterbuzz if there's some contradiction on their part.

That said, I dunno if it's common practice or not to not tell your VAs what's going on in the plot. The only other show I've watched that does the same thing is Madoka Magica. (Kyubey's seiyuu in particular was DEVASTATED once she realized what was going on)