Revealing mistake: In a close-up, just after the defeat of the Jabberwocky, the White Queen collects the Jabberwocky's blood dripping from its teeth into a vial. Cut to a wider shot with the vial just over half full, you can see that the drips are still being caught by the vial (ie, they don't drop past it onto the ground), but the level of blood in the vial doesn't rise, revealing that it is done in post-production.
Alice in Wonderland (2010)
1 revealing mistake - chronological order
Directed by: Tim Burton
Starring: Johnny Depp, Helena Bonham Carter, Anne Hathaway, Crispin Glover, Mia Wasikowska
Continuity mistake: Alice's necklace keeps disappearing and reappearing after falling down the rabbit hole.
Alice Kingsley: This is impossible.
The Mad Hatter: Only if you believe it is.
Trivia: In the Red Queen's castle, after the Mad Hatter is arrested, you see a large mural on her wall around the doors. There you can see the Red Queen riding the Jabberwocky in the same looking armor as Alice later wears. You can also see the Pheonix from the book "Alice's Adventures In Wonderland"
More questions & answers from Alice in Wonderland
Answer: It could be time moves differently in Wonderland, than in the real world. In many time machine movies, the Hero goes off on his adventures, then returns as if no time has passed.