Based on various things (including ActiveHat's post), it's probably digital simulcast issues which other users are reporting works well on the x36 radios (but not all).
Curious - is there anything else in your area to try to listen to other than that system? How well does it receive other systems/channels?
WS1095 | WS1080 | PSR800 x 2 | PSR500 | PRO96!
BCD536 | BCD436 | BCD396T | BC296D | BC245XLT | BC600XLT | BCIV | VX-8R
Not a Radio Shack fan.....