Every Day a Little Death - S1-E12
Continuity mistake: Bree arrives home carrying a package in her left hand and bags in her right. In the next shot, when her phone rings, the package is gone, the bags are in her left hand and she answers the phone with her right. (00:07:10)
Continuity mistake: When Gabrielle and Carlos go out of the house to investigate what is happening when the Chinese maid starts shouting, they close the door behind them. In the following shots the door is open again.
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)
Continuity mistake: When Bree is talking to Lynette about what Lynette would say to Andrew's lawyer, in the shots facing Bree her right hand is on top of her arm, but from behind, her hand is under her arm. This happens again in the next shots.
Continuity mistake: After Caleb thinks he has killed Melanie, he wipes his right hand across his T-shirt several times and leaves one bloody handprint. When he gets home, there are now several bloody prints from his right hand on the T-shirt.
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 Nora dies, Lynette stands up and strokes her hand over her chin, so a little blood stays on her chin. During the yelling scene of Lynette towards Carolyn, the blood on her chin changes constantly between shots.
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.
There Is No Other Way - S2-E16
Continuity mistake: In "Thank You So Much" Valentine's day was on a Saturday or Sunday. In this episode, They are showing Bree marking her chores off a calendar for February and March 2006. The calendar matches the real calendar and Valentine's day was a Tuesday this year. The calendar doesn't match their previous episode. And they do state that "today is Valentine's day." not that they are celebrating it on the weekend.
Continuity mistake: As Chuck is speaking to Ben, the amount of sunlight on the lamppost behind Chuck keeps changing between shots.
Continuity mistake: In the 1994 flashback where Bree introduces herself to Mary Alice and forces her son Andrew to apologise when he stole a ornamental garden frog, the position of the frog changes between shots as Bree hands it to Mary Alice.
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.
Continuity mistake: Susan's house is burned down by Edie towards the end of season 2, but at the beginning of season 3 the house is exactly as is back to normal and as it was before the fire.
Like It Was - S3-E4
Continuity mistake: When Bree is talking to Vera about Andrew and her husband, Vera is holding a nearly empty glass of tea. She then fills the glass to the top, but when she picks up the glass after doing so, it's nearly empty again.
Like It Was - S3-E4
Continuity mistake: When Bree goes round to visit Vera, the camera is reflected in the door as Vera opens it.
Continuity mistake: Carlos swiped every thing from the table but a fork appears behind Edie. (00:18:35)
Nice Is Different Than Good - S6-E1
Continuity mistake: At the end of season 5, Lynette finds out she's about 6 weeks pregnant. At the end of the same episode, they do a "Two Months Later." In Season 6, Episode 1, Tom says after an argument with Lynette "Only 8 and a half more months." Lynette should be in her second trimester by then, with at most 6 months to go.
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.