In the set-up scenes at the start of the episode, Donald McCormack is at home waiting impatiently for his wife to get ready for a party. He looks at this watch and it shows 8:24 PM but the view over his shoulder shows that it's daytime outside. The sun in the Caribbean never sets later than 7:15 PM; by 8:30 PM it will always be dark enough to see stars (unless there's lots of man-made light pollution).
Adam Renshaw's foot changes position from when it is discovered until when Officers Hooper and Patterson arrive later. In the initial discovery, the right foot is behind the post and later it's in front of the post.
When Charles Crabtree calls for an ambulance his phone is clearly seen to be upside down as both the charging port and the headphone port are pointing directly at the camera in this closeup shot.