Seems to be a known issue of stadi not reading correctly. For some that is. Mine is pretty good. It is found that the closer you are the better the reading becomes. I take my final reading at 1500 yards out. For me, this seems to be accurate enough for a score. It does take practice and is a very good feeling when you score a hit by making it all happen by yourself.
But, like I said, the stadi needs some work from the developers.