I have also heard the "clicking" which was bringing up the 158.775 repeater. My impression was that it had something to do with the link with the 800 stuff, ie when it was done transmitting and the 800 system dropped the 158.775 conventional "heard" a kerchunk if you will and came back up. Kinda like having two conventional repeaters linked. The squelch tail from one bring the other up and vise versa.
Additionally if anyone is interested go to saratogaems.org and you can view the power point presentations that the fire and ems providers are using to train their folks. Very well done and informative.
Stay safe
Steve