When Dwight reversed into the Orbit stroller, at least one of its rear wheels had dislodged and was spinning on the road. In the next scene, when Dwight drives off, the stroller appears undamaged.
When Micheal was holding the baby for the first time there was something on the baby's mouth but in the next scene there was nothing there.
When Jan says "Would it help if you held Astrid for a little bit?", she's not holding a baby but a somewhat creepy looking doll.
When Michael is shown holding a baby, he is shown next to a Nerium oleander bush. However, this particular flower does not grow in Pennsylvania. It only grows in warm climates such as California (where the show was filmed).