When Roseanne is first seen going up to the perfume counter, she's already holding the bag she later comes home with that has the perfume in it.
When Dan sits down at the table to give Darlene a lecture, there are no placemats in front of him; Roseanne had just stacked them onto hers. At the end of his sentence, there are a few stacked in front of him, and only one is in front of Roseanne.
In the opening scene, there is a roll of paper towels on the wall, which are draped down to the counter, and covering a blue and white container. After a few shots, a black object appears under the paper towels, with the container, and remains for a few shots. It then disappears for a few shots, and reappears near the end of the scene.