After tennis, Bradford drinks about half of a cup of water and sets it down. When he picks it up again, it's half full, but as the scene changes angles, it alternates between half full and almost brimming.
The landlady smokes the smokeless cigarette down to the filter, it's just a long ash. In the next shot it's a full cigarette.
When in the museum, Natalie indicates a picture of Jethro Tull, the inventor of the seed drill, though the picture shown is actually one of Nikola Tesla, inventor of AC current technology and electrical engineer.