When Castle & Beckett are getting out of the police car to interview Parrino, there are two cars and a van in the lot to the right of the police car. After the scene changes, there is only one car.
When Castle puts whipped cream on top of Alexis' dessert, he spins his arm counter-clockwise in the long shot, but suddenly the motion is clockwise in the following close-up.
The development of the baby on the ultrasound photo and they fact that she knew it was a girl suggests that Candace was much further along with her pregnancy than her figure would suggest.