Bargaining - S5-E21
Continuity mistake: During the breakfast scene with Mike, Katherine and MJ at the start of the episode, the spoon in MJ's bowl of oatmeal changes position between shots.
Continuity mistake: When Lynette gets up from the PTA meeting to go to the washroom, she has a purse on her shoulder. After her confrontation with Anne Schilling, Lynette storms out of the washroom but she is no longer carrying her purse.
Audio problem: When Susan is on the catwalk at Gabrielle's fashion show, Tom announces what she is wearing, but if you look in the background you can see his lips are not moving when he is speaking.
Every Day a Little Death - S1-E12
Continuity mistake: When Edie is about to spray water on Susan from the hose, you can see that Susan is very close to Edie, but as the camera angle changes she is much further away.
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: At the start of the episode, Zach picks up some gravel from beneath the lamppost and throws it at Julie's window. But when he leaves Susan the flowers, you can see that the gravel has disappeared.
Continuity mistake: When Bree is preparing a care package to ship to Andrew's camp, she sneaks some lemon bars into the package, and quickly closes the two side flaps of the cardboard box, leaving the end flaps out. In the next shot, she is immediately taping the box with all flaps down.
Continuity mistake: Parker is tearing the flowers apart until there are none. In the next shot, there are some flowers left, and when he jumps off the chair, the flowers have gone again.
Audio problem: When Lynette tells her sons to clean their teeth in the bathroom, the boys turn around and in the mirror you can see Lynette saying the same thing with no sound.
Love Is in the Air (a.k.a. What I Did for Love) - S1-E14
Continuity mistake: When Gabrielle is putting the lipstick on Yao Lin in the department store, the lipstick changes between shots.
Love Is in the Air (a.k.a. What I Did for Love) - S1-E14
Continuity mistake: When Gabrielle is speaking to Mickey on the phone, she puts her earrings in a bowl but later on in the scene they are back on her ears.
Every Day a Little Death - S1-E12
Continuity mistake: When Lynette signs the clipboard at yoga, a close-up shows her signing it with her right hand, but in the next shot she is holding Penny with her right hand and signing her name with her left.
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.
Sunday in the Park with George - S1-E21
Revealing mistake: When Morty gets down on his knee to propose to Sophie, the angle of the camera shows the top of the set, which makes it seem as if there is no ceiling to the room.
Continuity mistake: When Lynette is at the school, the teacher is waiting outside eating. If you look at her hands, you can see that she has a white napkin. The napkin changes from one hand to the other between shots, and in one shot it is small and the other it is not.
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.
Continuity mistake: When John is speaking to Susan about his relationship with Gabrielle, Susan puts her hand on John's cheek, but in the next shot, when John's mother is looking out of her car, Susan can be seen with her hand on John's shoulder.
Continuity mistake: When Bree steals Mary Alice's tape in Dr Goldstein's room, she takes it with her right hand and grabs it to her waist while she raises her left hand to her hair. In the next shot when the doctor enters the room, you can see her right hand is up, and when the camera comes on her the next shot, her left hand is up again.
Continuity mistake: When the boy paints "witch" on Mrs. McCluskey's front door, he holds the container in his left hand and the brush in his right. But when Karen gets out and he runs away with the other kids, the two items switch positions.
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.