I know this is a bit old thread, but seems to no one found or know why the disk swap doesnt working on Aurora, I believe I have found an answer.
I was putting together an xbox RGH for a friend and I came across the same problem.
The problem is that if you start the xbox with Freestyle Dash as the main menu, the swap plugin does not work on Aurora Dash, and vice versa.
It is necessary to choose which Dash you want to use through Dashlaunch / Paths / Default, and Reboot the Xbox.
If the games folders and subfolders were working in Freestyle Dash, then there is no need to make any changes in this regard.
I personally use it as follows:
Eg hdd:/ Games/ Dead Space 2/ Disc 1
hdd:/ Games/ Dead Space 2/ Disc 2
Both "Disc 1" and "Disc 2" folders inside a single folder with the name of the game.
Hope it helps someone.
