I created a preset that happened to have two sharpening enhancements.
Not wanting this, I deleted it via the app.
I then created a new preset with the same name, only one sharpening enhancement.
However, the next time I used it, it contained two sharpening enhancements, not one,
I deleted it via the app, and then closed/opened the app. When I created a new preset, using the same name, again it had two sharpening enhancements in it, when next I used it.
I was not able to replicate this behavior on my machine, would you mind taking a screen recording of this behavior so I can see exactly what is happening.
I originally had preset with two sharpening enhancements. Here, I delete the prior preset, define again with one enhancement, close, open again, invoke preset, and it shows two such enhancements.