First time user of bore sight - AIM Sports 223 Remington Cartridge Laser Bore Sight

So I read the instructions to verify I was doing properly mounted my uh-1 gen 2 vortex anyway I chambered slowly and corrected my sight to the laser then I unchambered laser and rechambered laser it was well under the original did over and over every time I chambered was a different direction than the previous time the laser is bright but very skeptical because of the laser moving up, down, left and right.