Other mistake: Sid tells Stella that the girl in the martini glass died moments before the electrocution, except in the beginning of the episode you can see her dancing as she starts to be electrocuted.
Other mistake: The body in the bank has one entry wound because the gun has no kickback, but in the flashback of the manager getting shot the shooter pushes the manager back then shoots him twice, the managers body moving alone would have causes the two bullets to enter at to different points.
Other mistake: When Adam shows Mac how Suspect X finds her clients online, Mac comments that he's thinking of phishing scams, but in the closed captions, the word is mistakenly spelled "fishing."
Chosen answer: Probably to broaden the scope of the show's plot and give the audience a chance to see the characters in a different setting, People act differently at home from the way they do at their workplace. By the ninth season, the characters would have become overly familiar and predictable. It gives the writers a chance to do something different with them.
raywest ★