I'm not sure what the exact issue is but I turned on the hide clones function to clean up my advmame file as I bulk uploaded the whole .106 file. It did a great job of cleaning up that folder however it also hid every rom for every other non-mame emulator. Once you turn off that clone function all the roms are available again. Just seems like a weird bug and was wondering if anyone else had a similar problem. (pi2, PiPlay beta 9, 32GB class10)