Your last post is more like what your first post would’ve looked like. If players are unfamiliar with the abbreviations you’re using, then devs are too. If a dev has to ask you a question, that can add a lot of time to how long your question sits unanswered. You do yourself a disservice when you further dilute your thread by arguing with the people who try to help you understand this.
A possible explanation for the situation stems from something different I don’t fully know how to explain. It’s clear Soulforge picks troops that are “in the chest rotation”. But there are at least two points where a mythic might “be in the chest rotation”.
It could be when the mythic first releases. Or it could be something more complex. When most troops release, they are available in one particular kind of chest (legendaries) or a particular store (event/glory troops). They don’t appear in the chest rotation for 2-4 weeks. I’m not sure if mythics follow that rule, but it’s possible a mythic isn’t fully “released” until 2-4 weeks after it is featured.
That would explain this situation. Maybe someone else will go through the cycle history to see if there is evidence of how this works. I remember in the early cycles we had some discussion about how it was handled, but I do not remember if we figured out how it worked. My suspicion is it is true that a mythic isn’t “released” until 2-4 weeks after it is featured, because it’s just what happened.
A lot of GoW mechanics have silly complex features like this, and aren’t fully documented except through oral histories maintained by forum regulars.