If I have a movie in a folder, and then use Dolphin in the KDE Desktop on the core to move that movie (*.avi) and the .id3 file to a different folder, LMCE finds it in the new location and my attributes and cover art remain, except for the Media Sub-Type drop-down, which, in this case, would be set to "Movies".
I'm moving the movie around on an internal drive in the core.
I find I have to make a note of which movies I just moved and then go back into the webadmin and set the Media Sub-Type again for all the movies I moved.
Is that normal?