Why, when editing a Preset containing settings for the Denoising & Demosaicing tool, is this tool listed 3 times ?
- each instance has slightly different attributes
- they cannot be set On/Off independently … it’s either all ON or all OFF
Yes I also have the same thing, I think it’s a bug.
And only one of the three can be modified
the same here … while in my case the middle one seemed to “lead”
@John-M Setting the ‘Advanced settings’ gives an even more illuminating but still perplexing output!?
Puts tin hat on
Get a Mac 
Seriously though this looks like, somehow, you have the same tool from previous versions installed in the latest. Have you checked out the workspace?
@Joanna You already know what you can do with your first comment!
As for the second it is rather odd and wrong but they are all showing XD3 which is only a recent addition!?
Awww 
Yes, the is odd but I was thinking out loud if a user Workspace file could be at fault?
Haha, Bryan … I’ve learned to ignore Joanna’s “Mac fan girl” comments 
That’s a reasonable guess - but Bryan discounts it: he confirmed the same result when using the “DxO Advanced” workspace.
User workspaces are not necessarily updated when PhotoLab updates. Whether the workspace causes the triplicating or not can be checked by using a built-in Workspace.
The difference is …
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In the “Standard” or “Advanced” workspace, the area where changes can be made (are active) appears third.
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However, in my “Custom” workspace, it appears second.