On previous TV shows, when you select the show, it displays seasons and you select the seasons to see the episodes. Now, it shows all the episodes and you need to select each one to see what season it’s a part of. Was this intentional (and if so, why) or something you’re working out after changing the media information source?
If the visibility of seasons varies ‘by tv show’, you have to edit the properties of the show itself, and not the global library setting. (again, on the ‘Advanced’ tab)
I recommend to set the global library setting to ‘Hide for single-season series’
and then, in the properties of each tv show, ‘Use library default’.
It’s the easiest.