probably a simple fix

beating my head against a wall, the structure generation guide is useful which ive been reading in hopes of me finding the issue at hand. but no avail. One structure just isnt connecting anymore, i wanted it to initially add an extention so the structure generates deeper, but the extention now just ends the structure early? I thought it was with the jigsaw blocks just not being properly placed or labeled but ive double triple checked. Maybe im just overlooking something simple. hope im not wasting anyones time with this 😔