The reason , why I stated that I believe Superman 61 ,was Kal-L , ( even though named Kal-El ) is because of the year the story was done, way before the Silver Age 1956.
Also please look at Action comics 484, "Superman takes a wife " the earth 2 one.
look at the last page for the differences and see that Superman when back in time to discover the orgin of Kryptonite, and as a bonus learned about his origin.
I think that the problems with Earth 1, 2 , when the stories are being told, during the year they were written.
When the Earth-2 Superman was created, it was *retroactively* declared that most Golden Age Superman stories originally written took place on Earth-2, with the earliest versions of names/newspapers/etc. assigned to Earth-2 Supes; as originally written, it was assumed to be the same Superman from "Action Comics" #1 up until the then-present.
Most of the people on this forum/website seems to go with the "treat all the comics from 1938's 'Action Comics #1' through 1986's 'Whatever Happened to the Man of Tomorrow?' as the same Superman" approach, which might explain the confusion/arguments...