Phoebe is unable to touch the book of shadows after the three blonde witches cast their identity theft spell. The spell made the charmed ones "nobody", but they should still be able to touch the book because the book only rejects evil, and the girls are still good. Cole and Paige's friend Glen are just two examples of other non-witches that have held the book of shadows.
When Mabel freezes Paige and Phoebe in the attic, Phoebe's dangling earrings keep moving after she is frozen. Between that shot and the next, Phoebe's position changes and Paige's expression switches dramatically from aggressive to neutral. None of these things should happen, as the two of them are supposed to be frozen immobile.
In the episode of this episode, and throughout the series the enchantment to call a witches powers is used. This allows one witch to call and use the powers of another, however in order to use this spell, according to its first use in the season 2 episode, "How to Make Quilt Out of Americans" a potion is also needed to be drunk in order to achieve this. A concept which was never again used whenever this spell was cast.