when merging different CHDs only one launching option is created (bug?)

[3dlollo]

I am using CHDs for some PSX games, and when I select them and merge them, I noticed that the prompt ask me what is the parent item to use for the merging; so I select the one for disk 1.

Now if I go to the game and right click, the "play version" is actually not disk 1 but disk two, and only one version is visible. So if I want to boot from either disk 1 or disk 2, I need to delete the "play version" and enable the "emulator" option for disk 1 and disk 2. I didn't try to import the games directly using the option to merge games with the same title, but I suspect the same issue happens. 

This seems to be a new behavior, as I remember that last time I did a merge manually, the option to launch the right version of the disk was selected, and there were as many entry in the right click menu as there were disks. Did this broke in later version of Launchbox? 

To me it looks like a bug, as it is asking me which is the default and pick the other disk instead, and on top of that does not apply the emulator flag for any of the disks that have been merged; making impossible to launch a multi game disk from another disk besides the one set as default basically.