They started on the far end and when they got to behind the camera, they realized how many lines they still had to run to that area and the amount of space in the hallway to feed that area didn’t line up with the spec for the spacing in the room. Instead of ripping out what they had done, they just increased the density.

Same thing as when you’re signing your name on a birthday card and the first few letters are huge, but the you’ve gotta shrink the rest to fit before you run out of paper.