I’m not sure how that can be the case if you are in the S/2 of the S/2. All the wells penetrate some portion of that tract.
Long story, but I know a little bit about that unit. XTO has not, to my knowledge, sent out DOs on those wells yet. Some delay on allocation calcs or something and I don’t think anyone has gotten paid for the two new wells. XTO is kind of a mess. So there is probably a decent chance that it will all work out and the person you talked to doesn’t understand or there was some miscommunication. Or maybe I heard wrong.
I’d keep calling them. Ask them to explain the allocation math for the old wells and new wells, specifically in the context of you showing an interest in the old wells and not the new wells.