I just checked the specs on your bow and the brace height at 7" isn't overly low. And being that you're only into archery about 8 months, and without seeing the bow, I would likely suspect that it is your shooting form.
Even a slight change in your grip, anchor, release, just about anything will change your POI. You MUST strive for consistency from shot to shot. If you're positive it's not you than maybe it is the bow. Did the shop check it out throughly? It might be a problem with the limbs.