I just had a strange thought. What if every universe in Homestuck has a different "author"?
Aranea hints at the fact that Doc Scratch is the one who created Alternia, from a creative standpoint. As if he "wrote" it. And this makes sense - Doc Scratch took over Hussie's role for some time, and coexisted in the same place as him for some time.
So what if Hussie is just like, the author of the original kids' universe (B1)? What if someone else "wrote" B2?
In any other story, this would be a completely insane rambling, but here this is almost starting to make sense to me.