Episode #1.6 - S1-E6
Other mistake: The married couple are penned down on the whiteboard as Alex and Phil Owens, but in the episode credits their last name is Owen. (00:25:45 - 00:52:00)
Episode #1.6 - S1-E6
Continuity mistake: "Freddie" reports to DS Babu Frik the findings on the man on the boat, Danny Barber from Panama. He is holding the notepad with his right hand, reverse shot and the arm is down his side, back to the first angle and back to the notepad in hand. (00:21:40)
Episode #1.6 - S1-E6
Continuity mistake: When one of the brothers gets up and tells the other "Better than being old before my time", Mark Lightfoot is drinking from his glass, and instantaneously isn't in the next shot. (00:00:55)
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 ★
As long as such changes aren't an obvious continuity mistake (e.g. changing multiple times during a day), one can just assume the change happened in-universe as well. Things do get broken or updated occasionally. It adds a bit of realism, in my opinion.