I had missed this suggestion, hence the late reaction.
Plex’ default behavior is to group items based on how many / which episodes you added during 1 day IIRC:
- adding a single episode → displaying as single episode
- adding multiple episodes or an entire season → displaying as season
- adding episodes from multiple seasons, multiple full seasons or the entire show → displaying as show
There’s already a suggestion to collapse/group all episodes per show in the recently added hub (same goes for grouping them by season). I suggest you comment/vote in that thread in order to avoid distracting votes/attention.
Therefore closing this thread as a duplicate (though it already gained 1 more vote than the original).