After an episode is successfully downloaded I would expect that episode to be automatically tagged as not monitored. However it isn’t. I have to manually change the status.
Since it isn’t tagged automatically I get 2 or three copies sometimes of one episode. This stops when I manually change the status.
You need to set your quality profile to the right cut-off, otherwise it will upgrade until it reaches the cut-off. This will not change the monitored status, but will stop Sonarr from downloading other versions.
If you also delete files, set ignore deleted files to yes. It will unmonitor upon deletion
That might be my wording “quality profile”. Don’t change the quality tab, change the profile tab.
There drag your preferred quality to the top, select other acceptable qualities, and set the cut-off to the lowest quality you don’t want to upgrade anymore.