Fort_Master_Gustav (It's a mechanism put in place by the Creator [Also known as Blastial] to forbid the sudden demise of his experiements. After all, Cygnusia is just a massive experiment to see how the R-UPA and all would fare in a different universe with different factions. And now, Helix OMEGA [the kill switch] is getting rid of all of Cygnusia from this universe in a different way that won't trigger the timeline collapse.)
RedAndCosmoteer The only way I can really think of is that Cygnusia is a fixed point in time.
(Yeah, that's how it's accomplished in a nutshell.)
(Btw, the Creator is not on the level of Zekeria or Abyss, cause he didn't create the Forumverse, he simply threw some of his creations into it from another universe and watched the chaos.)