When Annabel hears the girls playing, she goes into their room to tell them how late it is and to go to sleep - but it's light outside. There are about 3 other times when it's supposedly nighttime and the light is streaming in through the windows.
When Jessica takes Dr Dreyfuss' laptop from his office the name Vaio can be clearly seen on the top, but when she is looking at the laptop at home the name is not there.
In the cabin in the opening scene, the girls' position relative to each other switches between shots when the cherry seed is rolled to them.
In the introduction, when the the car is driving on the icy road, the girls are not in the back seat.
When Annabel is answering the door to Jean Podolski Annabel has no makeup around the eyes. When they have moved in to the kitchen her eyes are in full makeup.
Two kids in the back seat with no restraints would have died on impact when hitting the tree.
The film is set in Virginia and while most elements are factual, such as the state seal in the librarian's ID badge, all cars in Virginia have a State Inspection Sticker on the center of the windshield. This is missing on all cars in the film.
The house the girls are found in has decor from the late 50s early 60s which indicates about how long it had been abandoned since they were left there. The house is in surprisingly good shape with no obvious windows broken out, no visible doors askew or holes in the roof.
When Annabel is searching Dr. Dreyfuss' computer, the folder containing his research is mistakenly labeled "Reasearch."
When Burnsie first finds the cabin and the girls, as he walks up to the cabin his shadow is visible against the door. The sun can be seen behind him, so any shadows should be cast towards the camera. The reason for the shadow is the board reflector used to provide fill light for the scene, but it can not accounted for by the depicted environment.
When young Victoria is walking into the cabin for the first time, she steps onto the snow which sticks to her foot revealing that it is a actually a white carpet.
At that age, in five years Victoria's eyesight would have changed so much that her old prescription would no longer work to make Lucas recognizable.
Mama (Edith Brennan) wants to reenact her suicide in the end but with Victoria and Lily instead, so that they stay with her forever. Why didn't she do this in the first place 5 years ago when the girls were initially stranded in the forest?
Mama (Edith Brennan) possesses Jean Podolski so that she can kidnap the girls and take them back to the forest, by driving in Jean's car. Keep in mind that Edith was a woman who lived in 1878, how would she know how to operate a vehicle that was invented long after she died?
Why is it that Mama (Edith Brennan) being given the remains of her deceased infant wasn't enough to put her soul to rest? She looks to have transformed into her beautiful self because she seemingly found peace but she still doesn't ascend to the afterlife.