Continuity mistake: When Chelsea returns back to the house, she runs through the front doorway and the door behind her is still open. In the next shot, the door is closed.
Continuity mistake: At the beginning of the movie, the car the characters take to the party has European plates. Later on, the plates are American.
Continuity mistake: After Henriksen is killed, Chelsea and Jake are shown driving down the road. At first there is no license plate visible on the rear door of her SUV. A few shots later the license plate appears.
Continuity mistake: When Adam's father starts playing with the box at the end, he has a just-lit, long cigarette in one hand. The shot cuts for only a second and the cigarette has burned down almost to his knuckles.
Answer: Not sure why you submitted this question for the eighth film in the series. But regardless, that's just a bit of what's called "retroactive continuity," which is a term for when a movie either changes or ignores things from previous films. Rather than having the box be in the cement floor, it was relocated to a cement pillar. This change was presumably just because the writer or director thought it would look more dramatic for it to be ripped out of a pillar as opposed to being just dug up from the floor.
TedStixon