I had this problem years ago. One thing I could figure was that my bow was slow (220 fps). I have upgraded (first to a 250 fps then to a 300 fps) I do not have the problem. My bow shoots identically from the ground to a tree field points or broadheads. Though I am not sure if my increase in speed was the solution in and of itself. There are so many theories that I can think of that can cause your problem. I believe that gravity plays a factor. From the ground you are arching an arrow. From a tree stand you are more or less sending it in a straight line (at shorter distances). Do you shoot a drop away or a fixed rest? fixed rest will cause more drag on the arrow and may effect flight from the ground to a tree. Carbon or aluminum? There are just too many factors. What I did was get a faster bow, drop away rest, carbon arrows, and went with a compact fixed blade broadhead. Im not sure if one or all helped me but it has worked. Good luck. I hope you figure it out. I know that it was a pain for me.