When Fletcher returns back to Vago's window with a flower; he stands in the middle of a circle of smoked cigarettes he discarded earlier. However when he throws the flower up through the window of her room which is a long shot; he is standing outside the circle of cigarettes.
When Nella Vago is speaking with her teacher Rudwig; she sits on the couch and he comes over to her. However, the orientation of his hands on the coach as well as the way she is sitting on the couch changes from one shot to the next immediate shot.