Oh my experiences of the CV days when agencies would take your CV and send the client their formatted one (your contact details excluded of course) saw many fun times , today they kinda push the work onto you and just robot send what you give them for most area's. Some contract work with good earning rates for agencies will still see them tailor your CV somewhat, but for most for the best focusing on relevant area's for the role.
But a few of my more interesting experiences in the past in interviews regarding CV's have been:
1) Them having somebody else's CV content with my name attached - had that a few times
2) Them having 3 versions of your CV and first question is which one do I use and why I always carried a copies of my original printed out on nice paper.
3) Being interviewed for a different job than applied (my CV and experience covered wide area) for and not finding out until the offer came thru.
4) Turning up at an interview expected to speak Hungarian as I had Hungarian notation upon my CV.
5) Many instances of reused aberrations or when one letter be mistyped by agency making for much fun, maybe been bitrot/errors at play thinking about how some of those transpired.
But often my favourites would be when you turn up and the interviewer is down to earth and starts by glancing over the cv he got and pops it into the bin saying, we don't need that and gets into some technical questions and banter. Those always enjoyable and in a way often been a sign of a good boss - somebody who can cut thru the crud and get down to the issue at hand without the song and dance.