Official comment
Here's what you'd see on the CDJ-2000 family:
CDJ-2000

CDJ-2000nexus

CDJ-2000NXS2

And to answer the specifics:
1) Only on a NXS2 model.
2) No.
3) No, that's only when players are linked via ethernet with a DJM. This can also happen when using rekordbox in EXPORT mode.