The Four Sets of Matching Guidestones at Goblekli Tepe

Why, perchance, would they need four sets of stones circles, with the placement of the guide stones all matching each other exactly (except for the large stones in the center which are carefully and differently aligned)? Why four of them if they were matching? And certainly of no use structurally to have them align with each other so readily. Why, if not for to get our attention...?

I made this video to show you how clearly the copy of one pit overlays on all of the other pits, as if rubber stamped by their civilization. Why, and what would it take to get the rest of the pits excavated enough so the seats could be used again to align both the person, the person's shoulders, and the person's head, while viewing in alignment with the other stone structures a star field and the planet's exact bearings in space, thereby.