Job seeker gets flown out to an interview and meets the successful candidate who already started in the role: 'Dude has only been there about a week...'

There are things in life that you'll encounter, and you'll find nothing you've encountered previously has properly prepared you for it. Usually, these things will be so off-the-wall that there's no way anything could have properly anticipated them.  

The very idea of being flown out to a final interview and accepting a position, enjoying lavish dinner with the company's owner, only to go into the office and meet the guy who has just started working in the role you thought you had been accepting, is so unreal. It makes you wonder if part of the plan might have been trying to get an insider involved in the purchase of this worker's current company. That's the only narrative that makes any logical sense in this entire thing. It is simply not like any organization to spend that sort of money without any sort of goal in mind, but maybe the sheer nonsensicalness of all of this just speaks to the gross incompetence of the son who was set to take over his father's company… "Tommy Boy" type situation indeed.