Movie count 16.3 and 17.3 differ ?

I run two versions of kodi on two android boxes. 17.3 and 16.3. They both use exactly same video library. Still, the 17.3 version shows a lower movie count than does 16.3. Is there a difference in how these versions coint movies?
I do have several movie collections, and some movies that are in parts.
Or do i need to figure out which movies havent been scraped? Is there an addon for that?

Sent from my iPhone (typie typie)