Let me clarify what
@RadioDitch said. Yes, you can have multiple sites from the same system in the same knob position. HOWEVER, it will lock the first site that meets the minimum RSSI threshold, NOT the site with the best RSSI. What does that mean...ex) you program Passaic and West Orange control channels in that order. BUT, you have a better signal on West Orange than you do on Passaic. Because you programmed Passaic first, if it meets the minimum threshold, it will lock on Passaic. Doesn't matter if West Orange is stronger. It will then hold that site based on BER.
What did APX8000 do? Well, for Bergen and Passaic I have one knob position programmed with Passaic then West Orange in that order since most of the traffic is on Passaic. If I start getting on the fringe of coverage, it will switch automatically and I can still listen to those departments (if one if their subscribers is active on that site obviously). Then the next knob position is just Passaic and the third is just West Orange. This way I can manually select and lock the site. You have to be creative in your programming to cater it your needs.