I already explained how that list was built SilentS. I don't know why you keep having to hit on the same issue.
The list of Ambassadors start when the Council of Kingdoms relations was created. The members of that council were: Koguryo Ambassador Tamo, Buya Ambassador Jentar, Nagnang Ambassador Dominoki, Koguryo Assistant Ambassador Solarian, Buya Assistant Ambassador Jesuil and a nagnang assistant ambassador who I forgot who was.
Such group was created to help form the tri-kindgom peace treaty. As you stated, Koyasoto, Greensky and SilentS were not part of such council.
They were Ambassadors of Peace. A position created just inside Koguryo ministry when Starrbrite became "Koguryo Minister" alone. Ambassador of Peace was not Koguryo Ambassador back then, it was just a position inside Koguryo Ministry. I'm not listing positions inside clans, ministries etc or else it would make that list much more complicated.
At some point, the Council of Kingdoms Relations was dissolved and kingdom ministries brought their "kingdom ambassadors" to be part of their ministry. I'm sorry that you can agree with not having "ambassador of peace" listed as if they were Koguryo Ambassador, but that does NOT make the information incorrect. It would actually be incorrect if I did put them there, because as you can see I'm not adding other alternative positions in Buya/Nagnang ministries, am not putting primarchs of clans, Ssaurabi leaders, Royal diviners etc.
If you feel it is so important to have Ambassadors of Peace listed there, perhaps I can add an observation at the bottom of the page which list them, but I won't put them along with Tamo because it will be pretty confusing for players to understand.