When Robert and Ray are standing and talking by the mirror on the wall, the type of mirror changes depending on the angle of the scene. Straight on the frame is beveled and to the side it is a box frame and the glass is clouded.
When Robert first takes the boxers from Marie, he holds them by the waistband. In the next shot, he holds them below the waistband.
ray mocks robert for living at the house rent free... but robert bought the house from his parents when they moved to the retirement village, it is roberts house.