I'm a bit confused by this statement in the Type-Moon wiki:

[quote=http://typemoon.wikia.com/wiki/Servant]Even the Holy Grail lacks the power to summon a true Heroic Spirit, so the process is facilitated by summoning them into one of seven vessels prepared beforehand. The Greater Grail makes a copy using information from the "main body" of the Heroic Spirit, an "emanation", that returns to them as information, in the form of a soul, upon the death of the Servant. Disconnected from the "main body", they are able to know of the actions of the Servant through records, as if reading a book.[/quote]
So does a Heroic Spirit knows about his actions as a Servant, or does he not? If he does, then if his Spirit is summoned again in another War, how does that work? If he doesn't, why does the wiki says "they are able to know of the actions of the Servant through records"?