The thickness of the lines in Meaghan's painting changes between scenes.
One of Meaghan's pictures is scribbled over with paint in one scene. In the next scene, Victor has the painting, perfect and untouched.
When Megan picks up the pin art toy before the children's faces appear, she picks it up vertical. The camera then switches to look right at the toy, and she is holding is horizontally.
Before George walks into the yard while Jesse and Sheila are arguing, he can be seen standing in the bushes.
When Jesse is in the shed putting away their only shovel, there are a few shots showing the shed full of multiple identical shovels.
After Victor and Sheila find Meaghan painting a man standing over 2 children on the wall, Victor asks Sheila if the painting might depict their children and that they may be the ones in danger.
This is before they even found out about the child murder case from years ago.
When Victor and Sheila find Megan's painting on the wall, this time with a man standing over the children, Victor says he thinks that it is a warning and that maybe it's their children and maybe they are the ones in danger. This is before they even find out about the murder, and it is not even till later that they find out the killer is still loose.