I had this same issue for a week. Then, when I respec'd again to move a couple of points, I realized that I had never trained the additional ranks of ES and Aimed Shot! Doh! I'm a shoe-in for guild noob of the month. Moral of the story: make sure you train after you respec.
Wow, I'm really embarrased to admit this, but I had neglected to train on the higher ranks or ES, Aimed and Stings. I knew something was not quite right, but figured I was just getting used to the new spec and shot rotations. Man, did my dps shoot up afte training. Guild had a good laugh. hahaha! Oops. Thanks for your confession alarge.