That's why I've learned to look first at IMDB before going through the capping process. It happens to admins too!

That have defentelly happen to me too...
...or when you do the caps and then spend several days doing research on all the cars and someone uploads the entire movie with all the entries as unknown in just a few minutes...

I already had the case too long time ago (both: existing movie, or someone else adding it in the meantime)
To solve both issues it is good to create the movie page before doing the captures (with possibly a comment saying that captures will be added soon)

So, so many times...

Oh, yeah Ever complicated codes for these vehicles, the harder to differentiate between them.

I discussed this with Sandie years ago, but it still makes a great meme: