Continuity mistake: At the end of the episode on 3/13/06, Lexie agreed to have sex with Tek in the small clearing where they were standing, while Sami was spying on them. Then, on the other side of the bushes where she was hiding, Carrie suddenly collapsed in pain. At the beginning of the episode on 3/14/06, Sami was still in the bushes and Carrie was still doubled over in pain as if no time had passed, but Lexie was at Marlena's penthouse and Tek was at the Brady Pub.
Continuity mistake: On 7/4/06, Kayla has a flashback to what she says is her and Steve's first Fourth of July with their daughter Stephanie. That would have been July 4, 1990. They talk about the various characters they're going to see at the barbecue later, including Jack. But Jack and the others they mention were actually stranded on a deserted island during the summer of 1990.
Character mistake: In the 7/19/19 episode, Rafe tells Gabi that, even if she can open the briefcase she stole from Xander, nothing she finds would be admissible in court as evidence, because it is "fruit of the poisonous tree." Rafe is a police officer, but he's wrong about this. The exclusionary rule only applies to searches by police. If a private citizen obtains evidence illegally, such as by trespassing or theft, it actually is generally admissible in court, although the citizen may be subject to prosecution for the illegal action.
Revealing mistake: On 4/6/16, Deimos researches Nicole on the internet and finds a full biographical profile of her. However, the contents of the page can be recognized as coming from the soapcentral.com page on the character, and it contains a lot of obscure, private details about the character written in conversational language, pertaining to things that would not be known to the fictional public (but are known to viewers of the show). For example, there is a "Crimes Committed" section that includes "Framed Arianna Hernandez for the Salem Muggings" and "Hid evidence and then lied to police about having proof that Kristen drugged and raped Eric."
Character mistake: In the 7/30/14 episode, Sami informs Kayla of Abby's indiscretion with hospital board member EJ and demands that Kayla fire Abby, or else Sami will cancel a large charitable donation. Sami gives Kayla an explicit choice, "either Abby gets fired or the hospital gets the donation." Sami is misspeaking here, because actually the hospital gets the donation IF Abby gets fired. Sami should have said "Abby gets fired or the hospital loses the donation" or "Abby keeps her job or the hospital gets the donation." (00:01:50)
Character mistake: On 7/5/11, Lexie says that Fay "wouldn't have had that heart attack if she hadn't been assaulted." Fay's eventual death was actually caused by somebody deliberately smothering her, although Lexie doesn't know that. However, as one of the doctors treating Fay, Lexie had concluded that Fay's death was caused by a stroke, not a heart attack. At that time, she also didn't think the stroke was related to her fall down the stairs.
Continuity mistake: On 5/8/13, Kristen DiMera mentions that her wedding to John Black took place 15 years earlier. This is factually correct in terms of show history. However, it draws attention to the fact that EJ DiMera, the child born to Kristen's impostor around the time of the wedding, was heavily SORASed (Soap Opera Rapid Aging Syndrome) and is portrayed by a 34-year-old actor.