All Stations that comply with the ATSC specifications are supposed to include a grid, for each channel/subchannel. There could be a problem with the PSIP (Program and System Information Protocol) that contains Ratings, Time, Program Name, SD/HD format Info. Sometimes the system gets out of sync. Every so often I have issues with KFSM. I have to reset my system (the computer), and then the Program Map Table (PMT) data is refreshed. I found that setting my Dipole Rabbit Ears (the Wands) at 45 Degrees, and about 10 Inches will result in a super strong signal from KAFT.
KFSM, KAFT, KFTA, KHOG are all to your south, but KNWA is in Garfield, to your East.