File system inconsistencies

I've been migrating ~40TB of data over to my new unraid server from my existing Synology setup.  In trying to get my movie library set up correctly in Plex, I noticed an oddity in the file system:

root@vault:/mnt/user/Movies# find . |grep -i future
./Back To The Future (1985).mkv
./Movies/Back to the Future Part II (1989)
./Movies/Back to the Future Part II (1989)/Back to the Future Part II (1989).mkv
./X-Men Days of Future Past (2014).mkv
root@vault:/mnt/user/Movies# ls -alh |grep -i future
-rw-rw-rwx 1 klieber users  22G Feb 18  2014 Back\ To\ The\ Future\ (1985).mkv*
-rw-rw-rwx 1 klieber users 8.8G Oct  2  2014 X-Men\ Days\ of\ Future\ Past\ (2014).mkv*

These commands were run sequentially.  The first 'find' command shows the instance of Back to the Future II that should be there.  The 'ls' command, however, does not.  That's one example - there are others, however.  All seem to be related to movie files that were copied via the FileBot docker container that I'm using.  Things that I cp/scp directly appear to show up just fine.

I've always done all my copying and mounting of shares via /mnt/user/*.  I've never used /mnt/disk#/*.  A full parity check was done (without error) a few days ago.  All hard drives (and, in fact, all hardware, period) is brand new.

Any suggestions on a) the cause and b) how to fix it?

thanks.