Continuity mistake: Robert Cummings makes a cup of tea, with milk. But when he puts the cup and saucer on the table, the tea is black, no milk.
Continuity mistake: Robert Cummings is talking to a Viennese doctor. The doctor lights a match for his pipe. Then, in the next shot, there is no match.
Other mistake: When Randy is making coffee in the kitchen with Parris, she pours the coffee out, rinses the pot, dumps the rinse water, then places the empty pot on the stove.
Suggested correction: You just described someone making fresh coffee in a clean pot. You forgot to mention after she puts the empty pot back on the stove she pours in the coffee grounds and adds water from the kettle on the stove.