The Chaos Origin Source was known for being the place where Chaos Energy was generated. But that didn't mean it was the only place in the Universe. Let's not forget that Lisan Universe was being attacked, so its Chaos Origin Source could be stolen. Even the Vruves wanted to do the same thing.
That said, although there was Chaos Energy coming from that crack, it didn't mean that its source was this Universe's Chaos Origin Source. It might be another source that was stolen. Or perhaps something else completely different. The twins and the other experts of Lisan Universe found plenty of items back in the Loporrits' Planet that contained Chaos Energy and laws inside.
Last but not least, there was also the Foundation Pillar of the Universes. They were the filters that transformed the Chaos Energy into lower-level energies. That means they also could be filled with Chaos Energy.
