Some movies show in 'Movies' Menu and some only in 'Video Files'

New to OSMC, with Raspberry Pi 2. I was able to add a source and get my files from a network location to be seen on my device. But only about 5 of the 30 show in the Movies menu on the main screen. The rest are accessible through Videos > Files. They are all in the same dvd folder structure - VOB files. All created using the same methods and softwares. I do have the mpeg2 codec and vc-1 codec.

Why do only a few show in the movies folder? I hate having to select individual files instead of the entire movie.

Thanks in advance.

Perhaps they haven’t been added to your library.
I can only suggest you consult this wiki entry to see if that helps.