Episode #4.5 - S4-E5
Revealing mistake: Florence prints the first page from the Saint Marie newspaper, from a generic "Thursday 12th"; the whole first page is taken by the news of the fire destroying the recording studio...but half of the article talks about "the world's largest message in a bottle", instead. (00:16:25)
Episode #4.2 - S4-E2
Revealing mistake: Camille puts the name of the victim and "Watergate" as search terms, and manages to find the relevant news item from the past. The URL of the website though is just the one of the (fictitious) homepage (watergatenews.org), and not of a specific article. Moreover, the article is half relevant info, and half generic guide about surfing with a brisk cut from one to the other. (00:21:50)
Episode #4.6 - S4-E6
Revealing mistake: Florence passes a mug of coffee to her boss, who goes on to sit in his chair and have a tragic overacting accident. However, when things were still normal and he merely approached the desk, you could see Florence already stop drinking and frown preoccupied before anything bad happened. (00:06:10)
Answer: Most likely they had only tropical exotic drinks, he wanted an old fashioned English beer.