I know! when Orlando says he used the vault too and saw Dave's death I was expecting more explanations about it. Like Orlando already "saved" Dave the same way Dave saved the others? Or is he still in danger? They just mentioned it once.
you're in luck it does go into more depth later, im more anoyed that Oz doesn't seem to know or care that orlando has apparently used the vault. Tho that could be the codeing making him give a generic answer if the word vault is used, not sure about that part.