Billy Skittle

Hi all. Long time lurker and hoping you can all help. Having a loft conversion done and I’m questioning some of the work done on the hip roof above the Bay windows. The valley tiling seems to be single tiles, cut in half, using both side. The right side showing the double Roman “hump” and the left valley showing the interlocking side. Also questioning how symmetrical everything is (the ridges on the gable and how the tiles have been laid (off-centre) Any thoughts?