In the school changing room scene when Francesca puts on her jacket, only the top button of it is fastened. In the next scene when she comforts her crying schoolmate in the school bathroom, all the buttons on the jacket are fastened.
Two different buildings are used in the ending scene as Francesca's residence where Enrico drops her off in his car. The building clearly has no glass lobby in the long shot. It has a glass lobby in the close up shot.