My Whistler WS1098 is scanning the MPSCS system in Northern Michigan. I primarily monitor the Oscoda County, MI sites, but other sites in nearby/adjoining counties are programmed as well for when I'm in/near those counties and/or propagation is favorable. I've noticed that several sites/counties use one or more of the same control channel frequencies throughout the system. If I choose to display sites, the actual site I'm receiving is not always displayed, but another county site with the same control channel frequency is displayed instead. The particular county site displayed, however, is too far for me to receive, so I must be receiving the closest site with the same control channel (signal strength indicates 5 bars). For example, the Mio site sometimes displays appropriately as Mio, yet other times as Genesee County when receiving Oscoda Co Sheriff or Oscoda Co EMS. The Genesee Co. site, however, is too far for me to receive, especially at 5 bars signal strength. And the West Branch site (nearby Ogemaw Co. at 4 bars) will sometimes display as West Branch and other times as Rogers City (Presque Isle Co.) Question: Do the sites use a PL equivalent that's programmable into the WS1098? Or, simply, is there a way to accurately display the site being received without locking out the other site(s) or control channel(s)?