Additional information...
This is my first Phase 2 experience and I noticed that I was still receiving some Asheville transmissions on my Phase 1-only scanner. After reading up on Phase 2 systems, I discovered that Phase 1 radios can continue to be used on these new systems. Most probably to allow for gradual migration to Phase 2 operation.
According to what I read, it appears that any talkgroup that has any Phase 1 radio affiliated to it will continue to operate in Phase 1 mode. Only when ALL radios in a talkgroup are Phase 2 capable will that talkgroup operate in Phase 2 mode.
Thus, it appears as if certain groups can still continued to be monitored as standard P25 systems until all of the older radios are replaced with newer Phase 2 radios. And this information seems to be borne out by my recent listening.
Interesting stuff!