You know... I'm starting to wonder if "1103's" death was in fact caused by "909+" in the spacesuit while "909" was in the diner getting a straw.
Wibbly Wobbly indeed.
I can certainly see that.
As for the Ganger theory and others like it;
Amy: "Maybe he's a clone or a duplicate..."
Canton: "That most certainly is the Doctor, and he is most certainly dead."
and from Confidential.
Steven Moffat: "It is definitely him."