Understood. Just want to be confident about a vehicle hanging in the air above my body! Super careful is the only way to go-seen guys at junk yards getting under vehicles with just the tire jack holding it up. Can't cure stupidSince yours were made before 2014, there really is no clarity. FWIW, a jack stand can still be rated per stand today. It simply wont be 2014 ASME compliant though.
IMHO, If I didn’t know it was per pair or per stand, I might as well assume the 6 tons are per pair to be one the safe side. But seriously, even if it is 6 tons per pair, that’s the capacity to hold a 12,000 lb axle. What are you lifting?