I believe I know what silhouette decoy you're talking about. I use one on and off. And while I agree with your finding on a deer circling in front or behind this decoy I solve this "problem" by placing the decoy either between 2 trees or bush and tree, etc so that the incoming deer's view of the decoy is blocked by the tree/bush. Now I hunt wooded areas and realize this is not possible in open country. But its what works for me.