It's not usually the SHB that drives the bees off but rather something else weakened the hive....the queen that you added didn't make it and then the hive was unable to grow. They used up all of their stores, etc. As they weakened, it made more room for SHB - a strong hive seems to keep SHB under control, so the problems that you saw at the end - SHB and wax moths are the consequence of a weak hive - not the other way around.
Linda T in Atlanta
I agree, weak hives are the window for shb to take off.
On topic off topic, I love watching bees try to sting shbs, its rather comical actually, they look like they get frustrated cause they really can't sting through the shb armour.