[Martha keeps her face schooled from the emotions flitting through her. Though, anyone who watches closely can see enough infinitesimal fidgets to know this information bothers her more than anything else she's heard yet today.]
Perhaps we're all being taken from different Universes. All similar enough but different in the fact that one has us in it and the others have clones for this place.
[OK, so it wasn't her most coherent thought, but it would explain why people from different timeframes knew their colleagues as they were and not as a creepy clone.]