Was he converted or could he already play as an 8? And who else?
I'm sure Gini had played at 8 before, as well as at 6 which is what I was referring to. But he was playing as a more attacking midfielder at Newcastle and continued playing it for the Netherlands whilst at LFC.
Players are always moving...
Mane moving from right wing to left, then striker.
Bajectic playing defensive mid as well as centre back.
Salah playing as a striker rather than winger.
Firmino as a withdrawn striker when he had played in other attacking positions - out wide etc.
Trent at right back rather than the midfielder people thought he might be.
You seem surprised that Klopp moves people around? He's hardly the only manager to do it, and it is partly why our system works. Players can take different positions on the pitch than they start in or are expected to play, fill in when other players move out of position and have a better knowledge of their teammates' movements.