Just so it's clear what's happening here:
I currently have 9 desktops. I'm in one desktop that has my web browser opened, and it fills most of the screen. When I hover over the Finestra icon in the status bar, it shows the 9 desktops.
I then right-click on it and select Options. Nothing appears.
I then hover over the Finestra icon again, and it shows the 9 desktops, along with an additional "Options" desktop.
I then click on that "Options" desktop, and it causes the Options dialog to appear on top of my browser. I then dismissed the Options dialog.
I then hovered over the Finestra icon again, right-clicked, and selected "Options" again. This time the Options dialog appeared over my browser, and did not create a tenth desktop.
So are you saying that any time an application manages to create a dialog that is not "brought to front", a separate desktop will be created with that dialog?
The other question would be: why is Finestra failing to bring the Options dialog to the front?