Other mistake: When robbing the bank at the beginning of the movie, Claire is somehow about to see the tattoo on the back of Gem's neck while he is standing, and she's lying on the floor looking up.
Other mistake: After Dan is killed by wolves you can see his corpse is covered by snow, only his hand is showing. When daylight arrives, you see that all the tracks on the slopes are still visible, and big patches of brown can be seen even though it's supposed to have been snowing at least 30 cms, enough to cover a human body.
Other mistake: The hospice male nurse Juan Is credited as Julio in the credits at the end.
Other mistake: The protagonist is still a kid, and she is telling in voiceover about all the things she vows to renounce hoping to have her dad back in health. On the porch she knocks repeatedly on the wood, but the magical numbers don't appear. (00:05:00)