In hindsight, it’d make sense for that hype to be a lie. Maybe Ozpin and co. just didn’t want Pyrrha to know about the relics: So they invented another reason for the Maidens to be kept secret. That way, their newest pawn could be controlled with a minimum of leaked intel.
I don’t actually think that that’s canon, though. The inconsistency is far more likely to be the result of sloppy writing.