User blog comment:Rassilon of Old/Young Justice spoilers at Comic-Con 2012/@comment-432124-20120816031134/@comment-1635895-20120820224218

When Greg has the order of ten episodes, I'm sure they were all outlined and whatnot, but when the order extended to twenty, they would have adapted accordingly. Episodes would have been moved around to later positions in the schedule. They simply extended the story they were telling, what is currently episode ten wasn't episode ten when the order was for ten episodes.