Your description makes me think you're receiving a reflected or diffracted signal. The direct path shown in the path profile
http://www.tvfool.com/?option=com_wr...dALLTV%26n%3d6 is quite severe, presumably depicting Cold Mountain.
If you're seeing either a diffracted signal bending around the terrain or, a signal reflecting off of a building or hill, the path may never be stable enough to maintain a lock on the signal.
Have you any desire to either build an antenna or assemble an array of commercial antennas?