Thanks for the update! We'll update our databases and coverage maps on the next round of updates.
The discussion on their site regarding the loss of coverage in the east is an interesting one. It looks like this problem is a combination of two factors: 1) they are too low on the tower, and 2) the tower they use is set back into the mountains about half a mile further back than most of the other TV transmitters on Mount Wilson.
You can see the relative location of KFLA's transmitter low on the left-most tower in the image below. The distance to KABC-DT's tower is about 0.5 miles. The distance to KPXN-DT's tower is about 1.4 miles.
KFLA-LD is on the KCBS-FM tower, but only about 1/3 of the way up.
From the transmitter's vantage point, Mt. Wilson (in the middle of the image below) and Mt. Harvard (smaller peak to the right) become major obstructions that affect communities to the east (blocked by Mt. Wilson) and to the south (blocked by Mt. Harvard).
They would need to move the antennas almost all the way to the top of the tower to shoot over these mountains and reach the communities that are now blocked.
Their coverage would improve significantly (as shown in the image below) if they could get their antennas near the top of the tower.