My experience with trunking systems came only from my living in VA with simulcast systems with only 1 or 2 towers. There, the 2nd tower had different frequencies, but one would hear all the same transmissions but only using those frequencies.
With all these towers here, isn't that the same concept? Which ever programmed tower that you are near, you would hear everything but only on that particular series of frequencies. I mean if I have Austin Bluffs bank on, I may not hear that tower in the Calhan-Elbert Co line area. I would click 'on the Calhan tower bank and hear the same thing I would hear in the city on Austin Buffs.
Why would I not hear one particular talk group on one tower but not the other? If you are confirming that Falcon FD is assigned to 4778 and do use that, then I will have to check my radio to make sure all the frequencies are programmed for Austin Bluffs. I would understand if 1 or more of those tower frequencies are missing (I've done that before!), would miss transmissions.
Thanks again for your responses, DW.