Continuity mistake: When Edmund first enters the castle of Jadis and he is crossing the courtyard, the statue of Oreius is visible in the background, which should not appear until the end of the movie. (00:50:15)
Suggested correction: That wasn't Oreius. That was a different Centaur. When Jadis turns foes into stone during the final battle, they don't teleport to her castle, as confirmed later when we see multiple statues in the battle field. The cut to the stone centaur in the castle courtyard is simply a transition (albeit a very misleading one).
Corrected entry: When Lucy came out of Narnia the first time, she was only gone for a few seconds. 5 to 10 seconds at the most. But when she goes in the 2nd time, Edmund goes in at least 30 seconds after Lucy. Wouldn't Lucy have already returned if time basically stops in Narnia?
Correction: I suggest you read "The Voyage Of The Dawn Treader", one of C S Lewis' later books about Narnia (filmed by Disney in 2010). In the first chapter of "The Voyage Of The Dawn Treader", you will read, and I quote directly: "Narnian time flows differently from ours. If you spent a hundred years in Narnia, you would come back to our world at the very same hour of the very same day on which you left. And then, if you went to Narnia after spending a week here, you might find that a thousand Narnian years had passed, or only a day, or no time at all. You never know till you get there."
Correction: Time doesn't stop in Narnia, it goes a lot faster. Lucy and Edmund eventually met up in Narnia the second time so it makes sense that they came back together. Lucy just spent a much longer time in Narnia than Edmund the second time she was there.
Corrected entry: When Edmund is following Lucy into the room with the wardrobe, once inside the wardrobe she closes the door, but when Edmund is looking at the wardrobe the door is open, then when he is going inside he opens the doors. (00:27:40)
Correction: She doesn't close the door all the way, she leaves it open just a little, and Edmund closes the door fully after he enters the wardrobe.
Continuity mistake: When the Pevensies enter Narnia, Lucy is seen in several shots with her arms at her side while Peter and Susan are apologizing to her, then her arms are suddenly behind her back to throw a snowball at Peter. She was never seen bending down to collect the snowball and Peter and Susan were surprised when she threw it at him.
Suggested correction: Right before she throws the snowball, she is seen walking up to them, so presumably, she made the snowball off-camera.