While showing Maddie roped to the wall shaking her bonds, the pillow appears beside the bed on the floor and then on the bed behind her with the hole in the wall near the floor visible or hidden by the pillow in the same scene.
In 27+ min u can clearly see the pillow landing next to the bed and upon the floor, but on the next scene u see the pillow on the bed and after that the pillow is again on the floor.
When Peter and Chelsea split up to look for Maddie in the container yard, right before Chelsea is radioing Peter "anything?" and he answers "no, you?" they are clearly in two different places, yet they are both walking by the exact same yellow container - even filmed from nearly the exact same angle.
Commercial containers have 4 letter to indicate the owner. The last letter before the numbers is always an "U".
The Washington, D.C. license plates have stamped numbers. In real life they have printed numbers.
The aerial view of the yacht harbor doesn't look like the one used for the scene on the ground. That is when Rose and Peter are about to get arrested by Chelsea and Erik.
No explanation for how the psycho killer knew where to find the Secret Service agents and start tailing them to the storage lot.
Maddie is securely cuffed to the wall throughout her incarceration. She knocks over the light stand (how do they get electricity into a shipping container?) and when her captor next enters she is miraculously free of her shackles and she makes her escape.