Doubled seasons in UI with different name but no double files / conflict with sonarr?

[blubleublue]

Hello all. 
Since installing with Sonarr tv seasons get displayed twice with different names. Season * and SE** Example:
Season 1 / SE01
Season 2 / SE02
...
SE** named seasons got added and that is something I dont want. Files are the same though, so no actual doubling of files. It happens on web and apps like infuse.

What is the best way to prevent this from happening and stick to the "Season *" naming convention only in the frontend?

In Sonarr I activated "Media Management > Episode Naming" and kept everything default but changed "Season Folder Format" to: SE{season:00} Pretty sure this caused this situation.


In general I prefer the file folder naming "SE**", but would like to keep the friendly name "Season *" in the frontend only and dont see additional "SE**" named seasons displayed.

Questions:

• Shall I revert the setting in Sonarr to default value? If so, will it then automatically adjust and remove the addition "SE**" seasons in the frontend?
  
• Or should I keep this setting in Sonarr to keep the folder names consistently formatted with "SE**" and need to change somnething in Jellyfin? If so, what?
  

Lastly, what is your advice on best practice on media / file management. Right now I have: Jellseerr, Jellifyn, Sonarr, Radarr + Downloader. What is the best way to keep all in sync and which of the tools should be in charge of organizing and naming, as most of them have built-in features to alter files automatically.

Thanks for any advice! : )

[blubleublue]

sorry for double post, combine if this is not wanted here.

update: I changed the naming conventions now according to Trash guides recommendations.
Still wondering what you think about it and how you are managing your files. Thanks!
Also not sure if things revert "back to normal" now...