Sarah,
I have seen babies born in the posterior position, with molding, with caput but still born vaginally and I have seen babies born via caesarean, with molding and caput also. It's hard to say whether this changed your outcome. I would be more inclined to say (without knowing your history) that you didn't fit into what most hospitals consider a normal timeframe and so felt that they needed to do something. Perhaps, Zander was having some decelerations on the CTG and they made the call because of that?