all files in the podcast folder [x] got deleted even though I chose 'keep files, delete podcast' for [x]

[khaihong]

Before creating a bug report please make sure you are using the latest docker image / code base.

Please complete the following information

• Installation Type: [Docker]
• Have you tried using the latest docker image / code base [yes]

Describe the bug
I wanted to try downloading 50 episodes for a podcast (I had about 20), so I changed the 'how many episodes to download' number in settings to 50 and chose 'keep files, delete podcast'. The github page says all existing episodes would be skipped, so I expected the 20 files to be kept - I also had other text transcript files in that folder, and they were also deleted.

To Reproduce
Steps to reproduce the behavior:

1. Go to a podcast folder and add some files
2. Click on 'keep files, delete podcast'
3. Re-add the podcast
4. Look in the podcast folder, only the folder and album files exist

Expected behavior
I didn't check the folder after deleting the podcast, but I'm guessing that re-adding the podcast overwrote the folder with a 'clean' folder. Please don't overwrite existing folders when adding a podcast.