That only means the Winegard was not properly pointed. The Winegard with a Wingman will out perform a Jack head to head in all cases if properly pointed. Take a look at the head to head comparison of the 2 units which is documented on this forum.
The good news and the bad news about the Winegard antenna is exactly the same. It is highly directional. Good....when properly pointed it will get the best signal at the best distance. Bad....if not properly pointed you may not get all of the available channels.
To make it all very easy you should add the Winegard Sensar Pro and you get the best of everything.