I climbed in my tree stand at 15 feet to practice shooting at 10 and 20 yards. I shot 8 arrows and 6 were total misses and into the ground under the belly. They were all on line but about 6-8 inchs low. I was bending at the waist and thought I used to shoot high from the tree with the old bow. The Ultra-tec was shooting fine from the ground. Any suggestions????