No Hikaru, this time you don't understand how time works.
Cadinae's life begun at his birth. Fairly obvious, but let's go into it a bit further, like, what race was he born? Templar. As Jeebus said, you can either be born a Templar, or be created a Templar. As young Cadinae grew up, he aspired to be a great Templar investigator, and ended up under the rank (or class, not sure which) of Denutemp. After a while, he lost a friend and was emotionally unstable. He traveled back in time following up on a lead, was captured, experimented on, but finally escaped back forward in time. The fact that it could be totally different aside, he went far to far in time. He went about ten years earlier than current time IC, and landed next to Calto at the time of Calto's greatest (and fatal) torment spike. It was there that he accidentally switched spots with Calto, not knowing so himself. *Two years later, he became a crew member for the New Gia mission, but he had a torment spike and teleported the ship away. The ship crashed on Tefilin (8 years later due to the post event time jump). Cadinae was just attended to by Zarethians while lying on the beach unconscious.
Here is a basic diagram of parallelism in a timeline _________________________Future a
_______/_________________________Future b
_________________________________/_________________________________Future c
Past \ Present \_______________________________Future d
\ \____________________Future e
\________________________________________________Future f
Using time travel you could not jump from the world of future a to e without going back to the present where they split off, which would be where some event or another altered its coarse. An event is required to change the coarse of history. If two things happen exactly the same way they will have exactly the same results. Now you'd be right in saying that the slightest variable can change things drastically, but when I say, exactly, I mean exactly. Transitive Property states that one thing is equal to itself. While Future a and Future c are actually on different timelines, they have the same events from the past to present. When Cadinae came from the future in recent topics he created an event that changed the future. Lets sat that it was the first event on the timeline. Had he not shone up, the future that would have progressed would be future c. However Cadinae, who is from future c, did come and change the future. Now the choice to create future f lies in our past. Cadinae did not travel to our past, so Cadinae could not have created this future variant of himself.
What does this all mean you might ask? It means that you cannot change a past event by acting in the future. I'm sorry Ocarina of Time fans, but it's true. The past is set in stone unless it becomes the present. You can make it the present by time traveling to it. However, what happened before the moment you arrive in the past, suddenly becomes the past, and cannot be changed unless you travel to it. The Cadinae who was fighting for Helios just now only traveled to our current present, so everything I outlined about Cadinae's past in the beginning of this post cannot have been changed by future Cadinae's travel to the present. Anything that hasn't happened yet IC, however, may not have happened to the Cadinae that just appeared to save Helios.
Basically, no matter what future Cadinae just did, he could not have changed anything that happened before his arrival indicated by the *.
Also, none of this changes that there is a present day Cadinae Rybic lying the Zarethian main world unconscious, and thinking he's Calto Rubian.