Is it just one movie? And does this movie always stay as “the most recently added”? Meaning other movies you add don’t bump this particular movie down the recently added list…
If this is the case then I suspect the movie was either added when your system date was wrong(giving this movie a timestamp way in the future) and/or the database timestamp entry got corrupt when the movie was first added.
In either case I bet you can solve the issue via Plex Dance
