The arrow fires from the arrowhead when drawn back. If you look nearly straight down, you have to adjust your aim such that the show goes from the end of your bow to the spot you're aiming at. Most games have it fire from the back of the arrow, this one fires from the front. Once you learn how that interacts, you can learn to adjust. Takes some practice if you prefer not to mod the game. Technically speaking, you have to adjust this same way aiming anything but straight forward, it just doesn't affect the shot noticably until the angle is more extreme.