Custani Valcho - Minor Factions can claim to hold territory as much as they like, but when a Major Faction comes around - as they hold a presence on the map game - they can choose to either respect what was written, or override it with their own narrative. You may not like it, but that's how things are. If your supposed claim on a territory is threatened, you can launch a Skirmish or Rebellion thread if the criteria is met. Should you feel that neither works for you, there's always the option of talking with the Major Faction admin staff in the hopes of them respecting what's been posted by you, and your minor faction. Ideally, this would result in your territory becoming a fiefdom within the Major Faction's territory, however that's not a guarantee.