Continuity mistake: This is the scene where Miles, Stephanie and her mother are sitting at the table in the bowling alley. Stephanie's mom is smoking a cigarette; the scene cuts to Miles and back to Stephanie's mom. She is now holding an unlit cigarette in one hand and a lighter in the other about to light the cigarette. It once again cuts to Miles and you can see the smoke coming from her cigarette and Miles begins to cough.
Continuity mistake: When Jack first meets Maya and they are all having a drink at the bar, Maya is holding a cigarette. We can see she is holding the cigarette up near her face when the camera shows her from behind but is all of a sudden holding it near the bar counter in shots of her face. This continues until about halfway through the scene.
Plot hole: During the scene when Miles is in the hotel room asleep while Jack is out with Stephanie, Christine calls Jack on his cell phone and then on the hotel phone. First disturbed and awakened by Jack's cell phone ringing, Miles gets up to check it to see who is calling. He sees that it is Christine calling, and then lays back down. The cell phone shows Christine calling and then IMMEDIATELY afterward, it says that there is a voicemail waiting. That certainly was an extremely short amount of time in which to leave a voicemail.
Audio problem: In the scene where Jack returns to the motel in the morning (after his first night with Stephanie), she's waiting for him on her motorcycle. When Jack goes back downstairs and gets on the back of the motorcycle, the sound effect is that of a revving bike engine, but you can see that Stephanie's right hand (the throttle hand) is not moving at all.