Other mistake: In the flashback that shows Adam Brenner playing his opponent using the word "Exvin", we can see that the X is also used in "Juxtapose". When the opponent adds an S to "Exvin", he is challenged and made to take back his tiles. However, the X would remain where it is because it is a part of another word. Since the opponent plays a word using an X later in the game ("Loxodrome"), we know that he must have taken back the X as well. However, that cannot be the case as then "Juxtapose" would not be able to stand without the X. He couldn't play it as part of "Exvin" due to the existence of the word Antothenics underneath Juxtapose.
Other mistake: This episode has four teenagers beat a contemporary to death with hammers, following a practice session with a pile of water melons. The boy is beaten to death sometime during the weekend, - probably on the Saturday.Prior to that is the practice session with the melons, which must be the Friday evening at the latest. The room with the melons is searched on a school day, Monday at the earliest. Yet the melons, in all that Nevada heat after lying around for three days, are still fresh looking, and there are no flies or other insects swarming over the juicy remains.
Other mistake: When the CSIs arrive to take in the accident scene from the Pharoah's Fury rollercoaster, the victims are covered in associated wounds and blood, from such a derailing accident. Yet no brain matter seen anywhere. When in a prior take, two of the rail cars had crashed face down into parked cars and pavement. While two other victims were thrown from railcars while in midair.