The little peaks are normal so you don’t dazzle oncoming traffic.
Most MOT garages will adjust it if it’s out, it happened to one of our Mini’s. I think it was £5 more than normal. They set it up so it’s right for the car, so the beam height/level and ‘peaks’ are in the correct positions... I tried adjusting but it’s kind of hard when the only thing you have is a house on an incline!