Continuity mistake: When Bree is speaking to Lynette on the phone, Lynette asks Bree if she could borrow her scarf to wear at the job interview. But when we see Lynette at the interview, she has no scarf.
Continuity mistake: When Bree and Phyllis are talking about the funeral, the door behind the Reverend changes from open to closed between shots.
Continuity mistake: Season 2, Episode 17: "Could I Leave You?" - When Mr. Beale throws a pencil into his mug, the pencil can be seen on his desk in the shot immediately afterwards.
Continuity mistake: While Betty Applewhite is talking to Bree about her son Caleb, the amount of wine in Bree's glass changes constantly throughout the scene without her ever touching the glass.
You Could Drive a Person Crazy - S2-E2
Continuity mistake: When Gabby first goes to visit Carlos in prison, they sit down at a table. Watch Gabby's arms. At one point, she folds her arms, yet in the next shot they are on the table. In the next shot they are folded, and in the one after that they are back on the table.
Continuity mistake: In the episode where Gabby kisses Tom Scavo and, in return, Lynette kisses Carlos, Gabby is making a smoothie. When she's drinking it (as Lynette and Carlos are making out), it keeps switching from her left hand to her right hand, depending on which angle the camera is facing her.
You Could Drive a Person Crazy - S2-E2
Continuity mistake: When Bree is at the shop and people are waiting behind her mother-in-law, you can see how the first woman gets into the shop but you cannot see the man who came in, he just suddenly appears there.
Continuity mistake: When Mrs. McClusky originally comes to the door to tell Andrew about Bree being laid out on the lawn, the cover to the dial for the sprinkler system is open. In the next scene, when Andrew goes over to turn on the sprinklers, the cover is closed.
There Is No Other Way - S2-E16
Continuity mistake: When Susan reveals her feelings in the operating room, the face mask Dr Ron is wearing covers his nose and mouth in one shot, then not his nose in the next, then his nose and mouth again in the next. (00:38:30)
Color and Light (a.k.a. I Must Be Dreaming) - S2-E7
Continuity mistake: When Gaby goes outside to ask for help with her dress, you can see that the door is open when she leaves, but a couple of shots later the door is closed, despite Gaby not being near it.
My Heart Belongs To Daddy - S2-E4
Continuity mistake: When Mrs. Mulberry's umbrella is run over by the garbage truck, the position of the umbrella changes between shots.
My Heart Belongs To Daddy - S2-E4
Continuity mistake: When Susan is telling Bree and Gabrielle about Zach, Gabrielle's wine glass has a small amount of wine at the bottom, but in the next shot is almost half full.
Continuity mistake: When Lynette throws the dirty diaper, it hits the glass wall and falls next to the trash can, but when the camera turns to Nina, in the background, the diaper is no longer there.
Audio problem: The opera singer seen at the beginning at the episode is dubbed. His lip movements don't quite match the tune.
Audio problem: Season 2, Episode 17: "Could I Leave You?" - Veronica's son's lip movements do not match when he tells her that he's thirsty.
You'll Never Get Away From Me - S2-E3
Visible crew/equipment: When Phyllis leaves in the taxi, a boom mic is reflected in the taxi's rear window.
Color and Light (a.k.a. I Must Be Dreaming) - S2-E7
Visible crew/equipment: Right at the beginning of the episode, we see a woman drop her daughter off at a strangers house. When the front door opens, a camera crew is reflected in the brass door knocker.
Color and Light (a.k.a. I Must Be Dreaming) - S2-E7
Continuity mistake: When Julie finds out about Susan and Karl sleeping together, the tightness of Susan's dressing gown changes several times throughout the scene.
Continuity mistake: When Bree grabs the twin's toy keyboard, she grabs it and holds it at a downward angle. But in the immediate shot she is suddenly holding it at an upward angle.
Continuity mistake: When Lynette starts talking to Andrew, her car door suddenly goes from closed to open between shots.
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.