Episode #3.8 - S3-E8
Other mistake: The timestamps on the CCTV screenshots indicate that the murder happened in early March (since they are from early February and they go back one month), but March already passed in previous episodes of the same season (gigolo calendar, bank statements). (00:29:00)
Answer: There's probably no particular reason. Sets and props on long-running TV shows often change as needed and for various reasons throughout a series run.
raywest ★