mergeFolderAlbums true/false does not "split" identical albums

[dvdr]

Hi
Am I getting something wrong with how the option "mergeFolderAlbums" works?
I have various multidisc-albums. One version is a CD rip, the other one a download-purchase. Both have the same "album" name - and of course their discnumbers are properly tagged. There only is a distinction in form of a "source"-tag, that I set to "CD" or "Studiomaster" AND that each version sits in its own folder.

When browsing my collection, these albums are always merged under ONE album title, with multiple (depending on the number of discs) #1, #2, #3...-tracks following each other.
I thought, I could "split" those albums by setting "mergeFolderAlbums" to "false" and that way produce TWO separate albums displayed in my control point (Linn app / Linn Kinsky / mconnect)?
Whatever I choose, "false" or "true", I always get a merged view of those two versions.

The same happens, when I display those old, infamous CD-rips of multi-discs, where I stored each CD in a subfolder inside the album-folder. They have a proper discnumber tag, but shouldn't "mergeFolderAlbums = false" split them up in 2 (or more) albums on my app, when browsing the artist/album section, each "CD"-folder producing its own "album"?

Is there any way (other than renaming the album title or using folder match filters) to not merge my album versions?