But I digress.
Continuity at DC got confusing for me after CRISIS ON INFINITE EARTHS, where they tried to smash down all the multiple earths into one continuity, and they got rid of Earth 2 (golden age) Superman, and many other characters. And even characters like Rip Hunter, the Atomic Knights and Kamandi, instead of each having their own world, became mutually exclusive and had to conform to one "DC universe".
Then in the late 80's and beyond, other writers began to chip away at the single-universe set up by CRISIS and bring back some of the characters and parallel worlds, so it was no longer clear what rules applied.
One example is Morrison/Quitely's JLA: EARTH 2. Which was Earth 3 in the 1956-1986 continuity. And now what had been the Golden Age parallel earth became the Evil JLA earth.
Since then, there have been so many reboots that I no longer know what even still exists.
Legion continuity being the pre-eminent example.
