If as shown on screen the emergency temporal shift only carrys one how would dalek Caan turning up on davros' command ship in the time war get Davros out of the time war answer it wouldn't, there would have to be a second emergency temporal shift generator in Davros' chair.
The goof items below may give away important plot points.
When the Doctor and the others are in the TARDIS after the Crucible's destruction, we can see Donna walking anti-clockwise around the TARDIS control panel. When we see her in the long shot of the whole TARDIS, we clearly see her pass Captain Jack Harkness. Yet when she comments on him "Being the best" a few seconds later, she is passing him from the anti-clockwise direction again.
In Torchwood, when Jack Harkness is killed he nearly always comes back to life with a loud and sharp intake of breath as he abruptly rises up. This standard sequence also occurs in the Doctor Who episodes Doctor Who: Utopia and Doctor Who: The Sound of Drums. The sequence is strangely absent in this episode when Jack is killed by the Daleks on the Crucible. Instead, he lies quietly and the first moment we are aware he has come back to life is when he cracks open one eye to signal the Doctor.