Ok, to start, let's discuss how thorough family listings should be in infoboxes. Like I said before, it should probably stop at grandparents and great-grandparents, niece, great-niece, and so on and so forth. Any more, and it starts to drone on.
On the other subject, E-1 Kal-El and E-2 Kal-El are from totally separate worlds, and shouldn't be said to be related in any way at all. Their family trees while similar, if not identical, verge from two different worlds, so to connect them to each other in any way, is inaccurate.