I think Littleal is right. When you bend your arm, you may need to shorten your dl from 1/2" to a full inch to compensate for this new " shorter stance" .

There are also other basics to look at. proper shoulder alaignment can be of great help when keeping steady. Shoulders should be pointing almost at the target to even left of the target (right handed shooters). Bow shoulder should be down allowing force of weight to press into the large shoulder bones without the use of muscle.

Both draw arm and bow arm should be relaxed (no flexing). Allow the major back muscle and shoulder bone to take the brunt of the weight. Both hands should also be relaxed.