That is not uncommon. As mentioned the fletching style will greatly affect the distance, with a double spiral fletch having the greatest stopping power. The other big factor is the angle of the shot. In hunting situations, ie flushing pheasants, most shots are at much lower angles which results in closer arrow retrievals. When shooting aerial targets just for fun, I would recommend using the maximum stopping power fletching style and keep the targets relatively low so that I can spend more time shooting and less time walking to get my arrows.
If hunting is the end goal then there is more to consider. If your flu flu only travels 50 yards when shot at a steep angle, you will probably be lacking the necessary knockdown power on a flushing bird at 15-20 yards. Stopping the arrow too fast can be detrimental in hunting situations as well as letting them fly too far can cost your arrows in many situations. Like Greg wisely pointed out, you really need to taylor your fletching style to the bird and terrain you are hunting. Small birds at short distances don't need as much retained energy as a goose at thirty yards.