MKAY created a topic of Ghost Gate

Hey i just finished reads from Indonesian translation. But I’m sorry if I’m jumble my writing. English is my third language.
Actually I’m not really understanding the storyline. The creator keeps juggling every chapters and I can’t predicated what’s creator wants to present to us…coz i find too confusing and many loopholes. So this is my conclusions although it is right or not.

What i understand.
So there are 3 mains character & 1 additional :
Lee giyoon (present) / muni (past)
Manager Jung yitae (present) / Doyornim (past)
The half Muni is the real mastermind aka ghost (He too created Jung Yitae - the golden eyes- and posessed Na junim. He can change whoever he wants with remarkable red eyes and long neck, long hand becoz he is snake ) After Muni died, he was living for many years jump to another person and suck energy from the living person until he mets Doyornim reincarnate as Jung Yitae.
And Yuran is shaman. Her ancestor was responsible for make The Half Muni that can’t die and living likes shadow/ghost in this world. Actually Doyornim is to blamed. He demanded Yuran’s ancestor to switch Muni body with spiritual snake. But becos of this insiden the karma falls on them. (What karma i dont know)

The present Lee Giyoon is actually reincarnate as half Muni’s soul. When yuran’s ancestor switch Muni’s soul, Doyornim demand to split Muni’s character. Doyornim only wants the innocent Muni to live. This results the another half Muni born and take revange for the present Jung Yitae. Lee giyoon is the innocent Muni coz he always act like he know nothing and ignore every of it. This is in chapter 81- lee giyoon dreams the incident and now he know why he always ignore the ghost he always saw. That’s explained why only he can see whats he recorded.


The loopholes / questionaire
In season 1 for the starter manager Yitae looked intimidating to giyoon. But i can’t understand suddenly the character change 360 degree. He looked annoyed when na junim disturd them at the stairs and after that Yitae start to harras giyoon frequently.


Another point explained
Yuran knew what’s she encounter when she accidently met giyoon and the golden eyes Yitae in meeting room. In elevator too she knew Na junim possessed by The Half Muni and got warning to mind herself bussiness. But she have to meddle too for the sake of her ancestor.

So i guess that’s all what i understand.