Have you removed all satellite system components?
Are you connecting more than one set at this time?
How many feet of cable are between the antenna and set?
The most reliable way to prove you have aimed correctly, is to use only one TV, one known good cable and the antenna. With one person adjusting the aim of the antenna and another checking reception at the TV, you'll want to sweep the antenna left and right in small steps to be sure you have the best aim. Use the signal meter on the TV if it's equipped with one.
This document
http://www.winegard.com/kbase/upload/HD7694P.pdf includes a drawing of the antenna. The longest elements are at the back of the antenna. The drawing is as if you were standing in front of the antenna and a bit to one side. The front of the antenna needs to be closer to the transmit towers than the back of the antenna.
The aim depicted in your photo appears correct.