both beams should shine in the exact same way and both should be at the same hight. its the same for projector hid or standered lights. now your problem could it be the way your looking at them,its very easy to look at them wrong. with out a light aligner the only way to check your light level etc is park about 12 - 18 feet away from a flat wall in the dark. what you should see is 2 lines, going from right to left your beem should be a line that then angels up to the left. both should also be at the same hight.
the reason the beam is like that is as another member said is to not dazzel other drivers but its not the lights that makes it look like one is higher than the other whilst driving its the beam pattern. if u need to ill take a picture of my light fall out on a wall for you.