Revealing mistake: In most episodes of the season, the computers at the station lack the power cable. It might make sense in the very first episode when it is mentioned that they aren't in a working state, but under Richard's guidance they routinely use it afterwards. For instance in episode 3 Camille during Tom Hilton's interview, Camille is looking at an active computer screen despite it being unplugged.
Episode #1.7 - S1-E7
Revealing mistake: When the guitarist punches the bass player in the face you can see him miss. (00:50:02)
Answer: Most likely they had only tropical exotic drinks, he wanted an old fashioned English beer.