I'd say you got lucky
. Glass inside glass, even with padding, just isn't a good mix.
As for the 38, they may not have packed tightly enough between the two tanks or when they loaded the truck, they didn't place the tank properly to keep it still or from having other things shift into it. When I saw them in the truck, they weren't wrapped in blankets or even boxed.
Just as an aside, this was a door to door shipment, no storage and they managed to bring the wrong truck to the apartment. They opened up the doors on the first truck and I didn't recognize a thing. The bald tires and pool table gave me my first hint it was the wrong truck
since I had never saved tires and never owned a pool table.