well your not wrong there... for the fun of it i tried changing the number on line 89 in that file from -0 to 1 and it loads,
Dunno if that would break anything but the game seems to load it now
Huh turns out thats all it needed though i haven't tested it properly but hey changing newItem.order = item.order.."-0" to newItem.order = item.order.."1" seems to have worked