The pencil drawing of Oliver's mom initially appears with a single half way fold when she looked at it. When Oliver found it, it was folded twice. But on close up of the drawing, the folds have completely disappeared.
All the way at the end of the movie, Oliver and Jordana are standing right next to each other on the beach, with Jordana's dog between them. Then the camera changes and they are seen from behind. Suddenly, they are much further apart and the dog is at the other side of Jordana.