Oh okay, then i've just misunderstood your request. Sorry!
I am not saying Emby has to know the genres rather a Emby user should be able select the genres that make up the category in Emby, not in the plugin.
I suggest to keep isSeries for every program entry, not recording, otherwise the users can not make any series schedules.
I will continue to pass the genres but given that the current filters are very weak and English-centric I will remove the it is... processing from my v5 port. Anyone can enhance this in the future.