Here are my UVs. Basically I unwrapped one half of the body. But the normal map issue only occurs right on the front. The back seems fine. However, since I unwrapped half the body, I can't really make the mirror seam perfectly vertical like you said. The entire contour of the UV shell is the mirror seam. Uploaded with…
Well, one thing to try is you should probably have your model mirrored and welded before you bake. Take the mirrored half and move its UV coordinates over by 1 unit, then re-bake. This may resolve your issue. Also, post up your flats/UV's if that doesn't solve it so we can troubleshoot further. It tends to help if you have…