This recommendation is based on the tvfool Current Plus Pending Applications Included for Digital Tv Stations/Channels.
Make a 'Simple Modification' to the 2 bay UHF antenna that you have.
Remove the 'reflector screen' and now the antenna will receive at the front of the antenna and the back of the antenna. (and if required at some time in the future the reflector screen can be put back on.
Now aim either side of the antenna at about 15 degree magnetic compass. I suspect that all of the Tv stations/channels in the green and yellow zone of the tvfool radar report will now be received.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
Also having the antenna in the attic does reduce reception , install the antenna above the roof for better reception.
The alternative to removing the reflector screen and/or moving the antenna above the roof or both is to buy a different antenna and/or install a antenna rotor.
Antenna rotors Are Not friendly for channel surfing , must wait for antenna to rotate.