Jellyfin is not able to group series together and on top of that shows everything in random order, why bother with it when there are alternatives that can do that?
I have one folder with movies and series. It shows as a randomized mix, maybe it uses something like modification time by default? It's definitely not by name.
Sheeny96|1 year ago
ValleZ|1 year ago
russelg|1 year ago
ValleZ|1 year ago