Continuity mistake: In the scene when Sally is about to audition, another little girl goes before her. When the little girl finishes, there is a shot of her face with her hands on her head. In the shot from behind, we see her put her hands down, but when we see the shot from the front, she is putting her hands down again.
Continuity mistake: Dickie is finally convinced to take off his gloves for good later in the movie. But not long before this scene when Dickie is making fun of the bullies at school, he has no gloves on the entire time.
Continuity mistake: In the scene where Dickie is in the stroller, when his "mother" talks to her friend, watch over the friends right shoulder, the van keeps disappearing and re-appearing as the shot changes.
Continuity mistake: When Dickie meets Sam and Sally getting off the schoolbus, Dickie is holding a brown ballcap in his left hand, but when they walk into the house he is wearing a blue one.
Continuity mistake: When Dickie is helping Sam get Barbie to go out with him they sing a song on stilts. We see the stereo that is supposedly playing the music and it is to the right of Dickie. When Dickie falls down on the stilts he falls to the left and the music stops like he had hit it. It was on the other side the whole time.
Continuity mistake: After stealing the car, Dickie stops at the traffic light. After insulting the guy in front of him, he rolls up the windows, then drives away. When the camera angle changes, you can see that the window is now still half way open.
Answer: Maybe Leif called Dickie, or vice-versa, without actually SEEING each other. Maybe it's not a weekly thing, maybe Leif is new to their poker group.