Well, as long as the weather holds true and the conditions, I noticed on my 800 MHz system today the same problem, yet the scanner in the Comms shack was just going wild on lo-band 30-50 MHz. On search, there wasn't one time the scanner would go a couple MHz without stopping on something from a couple hundred miles out.
When lo-band skip peaks, our 800 MHz system is weak. It's just the nature of the beast, no matter how many towers you have to cover.
rcvmo