Here's a map showing the differences between the two stations (this animated gif will flip back and forth between WKHA and WAGV). The hilly terrain breaks up the coverage quite a bit. For WKHA, the west-facing slopes are lit up. For WAGV, the signal is weaker because the transmitter is farther away, and it's mostly lighting up the south-west facing slopes.
To be in a good spot to pick up these two channels, you need to be at the top of a hill with a clear view toward the west and south-west.