I just did copperbell mine(hard) unysnced for journal and a few NPC appear at the end, 5 of them, with the same spread location of Trust NPC and they have duty completion dialogue. Have they always been in there?

There is one of the dialogue I will copy and paste.

"Brawny Miner: All in a day's work, eh? Now back to the Quicksand, and the first round's on me!"