Yeah, this sounds pretty bad. I wouldn't mind a cute little joke about it, like when Martha was talking about her cousin. Hell, that could work when the Twelfth Doctor meets Jack.
Jack: "What the hell?!"
Doctor: "Oh, hello Jack. Nice seeing you again."
Jack: "You died. I confirmed that!"
Doctor: "And then I regenerated."
Doctor: "Someone else you thinking of?"
Jack: "Got to say, I'm not liking this new look."
But this? No, just no.
I remember Russell [T Davies] told me that he had a big old plan as to why there were two Peter Capaldi’s in the Who universe: one in Pompeii and one in Torchwood.
Wouldn't that just be the time/space duplicity thing that explains why Gwen Cooper so similar to Gwyneth from The Unquiet Dead?