Geum Ann:
Yes, I agree the part in EP 1. Where did this future LG come from, if memories are being merged like we see with TE, how come LG doesn't know anything. I think this can be xplained if we assume there is another timeline not being shown, let's call i timeline omega, that all happened off screen.
Still dont make sense because we can see in alpha timeline Luna use a rabbit jacket and get the key for acces the palace horse racing so that she can be there and LG following her and find a portal to RK, its all because LG tell/meet yeong (just exactly happen in beta timeline). How can luna have the key for acces the palace horse racing in alpha timeline if its not LG plan? And why yeong not remember meet LG in alpha timeline? And still many why in my head. The more i think about it the more i get confused :")
LG goal ever since he realizes he is stuck in the past, is to make sure the alpha timeline with TE in it getting stabbed and etc... to be parallel to the current timeline he is in.
But he has to make sure everything happens like in the past. If he doesn't leave the jacket and key card, he realizes he will never have gone to ROK to meet TE. How he figures out what parts of the timeline he has to change, well thats just LG being all knowing.
In the ends it's all contradictory. On one hand, LG is trying not to change anything in case it drastically changes the future.
But on the other hand he does a lot of things that should change the future, like talk to TE as a kid and as an adult.
But the shows TRYING to show that all these changes don't amount to any significant changes.
Once he is able to change the timelina Alpha to coincide timeline Beta, the two timeline will bexcatly the same, and thus merging.