Continuity mistake: When Ryan is lighting Marissa's cigarette with his, at the start of the shot it's full, then the shot goes to Ryan and it's still full. But then the shot goes to Marissa and if you look at Ryan's cigarette you can see it is almost all gone. Then the shot goes to Ryan and the cigarette is full again. (00:09:00)
Continuity mistake: When Marissa is dumped on the driveway by Summer and Holly, Ryan first sees her there her left arm is across her chest with her elbow sticking up. The next shot of Marissa her ams are straight and spread out, and the next they are close by her sides, which is impossible for her to have moved them herself as she is unconscious. (00:34:15)
Continuity mistake: When Sandy first picks up Ryan, we see in several shots that Ryan's bike is in the trunk, and that the trunk is open. However, when they drive up to the house, the trunk is now closed, with no bike.
The Gamble - S1-E3
Continuity mistake: When Kirsten and Ryan are talking while setting up for the Casino Night, the camera cuts between Ryan And Kirsten while they talk. Whenever you see both characters in one shot, her fringe is forward, but when you see the individual shot of her, her fringe is pulled back behind her ear. (00:18:10)
The Escape - S1-E7
Continuity mistake: When Seth and Summer are having breakfast at a cafe he pushes his toast towards her and she eats the crusts. But in the next shot, and for the rest of the scene, the plate is still beside Seth.
The Gamble - S1-E3
Continuity mistake: At the part where Kirsten brings Ryan and Seth to help set up the hall, Seth starts to blow up balloons with helium. In one shot he has an orange balloon under his arm and is tying the bottom, and the next he's starting to fill up a different balloon, without time to finish tying it and pick up a new one. (00:15:50)
Continuity mistake: In the scene where Ryan and Anna are learning to waltz Anna's hand goes from the top of Ryan's shoulder to the side of his shoulder and back to the top of his shoulder between shots. (00:16:30)
The Escape - S1-E7
Continuity mistake: When Marissa and Ryan are out at the vending machine, Marissa hasn't got her cell phone with her, and she hasn't got any pockets, but then later when they are heading back inside just as it rings she is holding it.
Answer: He means that if Alex has to go so far as to forbid Ryan from seeing Marissa in order to maintain her relationship with her, their relationship obviously isn't working.