There is much more space inside the house than would be possible in the house seen in an exterior view. Also, there is an enormous living room on the ground floor. Houses of this type have the main room on the first floor.
When Chips Maguire is telling Tommy about the house being foreclosed; Tommy has both his hands deep inside his pockets. But on the next immediate cut as he turns; both his hands are now hanging low outside his pockets.
Near the end when the Great Boldini is performing at the Gay 90's club, it is clear when he puts the collar on the dog that there is no fishbowl on his back under his cape. Yet moments later there is a big bulge on his back and when the dog pulls the cape off, there it is.
Chips says that he and Tommy should hide out in Tommy's mother's house because no one will think of looking for him there. But when Tommy says he wants to go there on his own, Chips dissuades him by saying the cops will easily find him there.
At the 17 minute mark after Bogart stands up from the bed the boom mic shadow moves across his hat.