How is DCF secured to the nose to prevent shifting? Too high, causes pressure on skin and problems? Eyelids now asymmetric.

How is the DCF secured to prevent it from shifting on the nasal bridge? My graft is pointing to the right side near my eye and feels sharp. Leaves a red bump on that one spot when I wear glasses. Bones have moved after an osteotomy could that be the reason the graft doesn't sit properly? What are options for correction as I received a sky scraper 8mm b/w my eyes instead of a subtle change (slight increase 4-6mm in height n alar base reduction )? Nose is wide at tip-due to spreader grafts.