Continuity mistake: When Karl is speaking to Susan whilst she's in the towel, we see in one shot his chin is resting on his palm, then when the shot changes he tilts his head and then moves his fingers to his chin then when the shot changes his chin is resting on his palm again. (00:25:00)
Impossible - S1-E15
Continuity mistake: Episode 15- When the housewives are sitting on the porch discussing Mike Delfino, Teri Hatcher's green shirt keeps changing positions in the shot. It goes from down around shoulders to close to her neck and back.
Love Is in the Air (a.k.a. What I Did for Love) - S1-E14
Continuity mistake: When Susan's reading her Valentine's card, in the shot over her shoulder she closes it. The angle then changes so we can see one of the other housewives approaching - her card's now open and she shuts it again.
Love Is in the Air (a.k.a. What I Did for Love) - S1-E14
Continuity mistake: Bree Van De Kamp is sitting in a chair talking to her husband Rex while knitting. In one shot, after the camera goes back to her, the object that she is knitting disappears, then re-appears when the camera comes back to her later in the scene.
Continuity mistake: When Mike is taking his dog to the vet, we see that Susan's hair is covering her ear in all the shots except the last one when her hair is behind her ear to show that the earring is gone. (00:39:30)
Continuity mistake: When Bree is about to leave the hospital she picks her bag up with her left hand to put it on her right shoulder but when the camera angle changes she's put the bag on her left shoulder with her right arm.
Love Is in the Air (a.k.a. What I Did for Love) - S1-E14
Continuity mistake: When Lynette is chasing her neighbor out of her boys' bedroom and has a pillow in each hand, one is spotted and one is light blue. She raises the light blue pillow to throw at the neighbor. When the camera switches to the bedroom door, its the spotted pillow that hits the door behind the fleeing neighbor.
Love Is in the Air (a.k.a. What I Did for Love) - S1-E14
Continuity mistake: When Gabrielle fires Yao Lin, you can see that Yao Lin isn't wearing long sleeves, but when she passes Gabrielle, you can see that she's wearing a long sleeved white cardigan in the reflection of the mirror behind Gabrielle.
Every Day a Little Death - S1-E12
Continuity mistake: When Gabrielle is eating fried chicken on the walkway, the bucket she is eating from mysteriously turns between shots.
Every Day a Little Death - S1-E12
Continuity mistake: When Gabrielle toasts to Carlos' return, the volume of champagne in her glass changes between shots.
Continuity mistake: When Bree, Susan and Lynette are scrubbing the road, a red sports car zooms past them. Lynette stands, hurls abuse and throws her scrubbing brush at the car which can be seen bouncing off the car and down the road. She then kneels down and continues to scrub with the brush.
Running to Stand Still - S1-E6
Continuity mistake: When Bree goes over to talk to Dr. Goldfine in the restaurant, she puts her napkin on top of her plate, but when she sits back down, she takes it off of her chair.
Continuity mistake: When Bree gets out of the golf cart to see Rex on the field, she is carrying a pot of urine in her left hand, but in the next shot, of her upper torso and face, her left hand is clutching the strap of her handbag and the pot is now in her right hand.
Continuity mistake: As Susan tries to get the dog to help the second time you can see the towel Susan tried to use to get the dog to help her. The shot then shows Susan and the towel has disappeared. After a quick shot of the dog it cuts back to Susan and the towel has reappeared.
Continuity mistake: When Susan and Mrs.Huber are together in the Supermarket the position of the egg box keeps changing in between shots on the conveyor belt. (00:18:00)
Continuity mistake: When Bree sees the presents that Rex has bought for the children, she walks up to the car. As she stops walking you can see her hair particularly on her left side is being blown gently by the wind and continues to be blown through most of the shot. In the following shot her hair is now sitting perfectly without any wind blowing it.
Sunday in the Park with George - S1-E21
Continuity mistake: When Gabrielle throws some salsa in John's face, it makes a mess, especially in the eye area. However in the next shot his face appears completely clean.
Continuity mistake: Season 1, episode 1 (Pilot): While Gaby and Carlos are arguing in their house, we can see a sofa and some other items in a semi-circular alcove with five tall windows on the far wall of the front room, and a painting near the stairs. A minute later, Carlos leaves and Gaby is alone with John, and the room has changed drastically. The alcove is now a flat wall with two windows and a fireplace. The sofa and some other things are missing and the painting moved to above the fireplace. This inconsistency exists because after the pilot was filmed, the set was redesigned and the part of John Rowland was recast. The scenes with John were reshot after the redesign took place, but the majority of this episode, including the first half of this scene (the argument), used the original footage. (00:17:30)
Live Alone and Like It (a.k.a. An Unexpected Song) - S1-E19
Continuity mistake: Lynette opens the door while she has sunglasses on. Then she is holding her glasses. It never showed her taking off her sunglasses. (00:13:20)
Continuity mistake: When Lynette is sitting on the bench chatting to Claire in the park, you can see that Lynette has her hand on the pram, but when the camera angle is behind Lynette in other shots, she no longer does.
Answer: Kayla was sent away in episode 16 (The Gun Song) in season 4, after falsely accusing Lynette of child abuse. She now lives with her grandparents - probably Nora's parents.
I'm curious why we never see her again, why she never talked about, and why Tom never mentions visiting her.