Netflix could only see film 1 for some series, all others are then blocked, or for a series e.g. 15 films, episode 7 not in the middle?

Netflix could only see film 1 for some series, all others are then blocked, or for a series e.g. 15 films, episode 7 not in the middle?

Could it be that there's an age lock? But then Netflix asks for the password in the corresponding episodes. My second thought is that the episodes simply don't exist on Netflix.