re: Our Moon's own moons
As I wrote, 4 are only left orbiting the Moon.
The others (Luna 11, 12, 19, 22) were too low to have been able to stay in orbit, even if we don't really know as their data seased to be transmitted long ago.
OTOH, Luna 14 has been catapulted into solar orbit (because of the Mascons).
The 4 remaining were in a high enough orbit.
Raoul