Sorry, I may have misworded the previous question. What I meant was how is it possible for the A1 trolls to be delivered from the A2 universe? The comic states that the scratch alters the destination points for the meteors carrying babies/wigglers, but seeing as ectobiology occurred post-scratch for the trolls, I'm having trouble seeing how the mechanics on that delivery worked.

This “glitch” in their session was one of the reasons they had to scratch. Since that session wasn’t the one they were spawned in it was doomed to fail.