I will never recommend a mohu leaf or other similar antennas.
That said.
The mohu leaf is a 2 directional antenna , the flat sides are what is aimed at the groups of Tv stations to the , north/north west , south/south east.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
Try the mohu leaf in a window that faces the south east.
Do a double rescan.
Digital tuners can develop , 'Digital Glitches' , that are not cleared out doing single scans for Tv channels.
A double rescan clears out the digital tuner for a clean new scan.
http://www.dtv.gov/rescan.html.