One thing still confuses me. Siegel and Shuster’s original nespaper strip samples, created before the DC deal, were used in several issues of Action so why is only the material from #1 covered?
Kurt, I’m going to venture a guess that the issue wasn’t raised as it would have required a lot more research to set the timeline for the creation of those stories. It’s been a little while since I’ve read Superman Chronicles and the early Archives, but I don’t recall any really major developments coming out of the early “strip” stories. For ease of litigation, the main baby was the story in Action #1. It established Superman, his powers, Lois and the baseline origin. It was also very well established that that story was not created as work-for-hire. Adding in the other “strip” stories would have muddied the water with not a lot to gain.