Continuity error?

[Gooer]

Hey guys.

Forgive me if it's been mentioned already (it's been awhile), but something i heard confused me.

I was listening to the end of season 4 today, and I feel there is a continuity error. When Burt+Riley find Tardust and warn the colony of Scratch (chapter 45-2), CJ says that she managed to talk to all the other groups because they pointed their relay dishes to the colony. But then later on, when everyone is talking about Micheal entering the tunnels(chapter 47-2), CJ then says she cannot ask the other groups for help because their dishes aren't pointed to the colony.

Am I listening to this wrong, or is that a genuine plot error?