OK with the new update for "passengers" I completed Resettle Colonists to get 5 Colonists all of which when to the passengers tab. Now I already had 4 and they are will in my normal roster.
Given I now have 9 Colonists I went to do a Relocated Colonists to Federation Borders but it says I only have 4 Colonists so I can't even select to do the missions even though I have almost double the requirement.
I can confirm this.. I have Establish Forward Base in Delta V active.. I only finished a colonist pickup an hour ago, and checking the Passenger's section they are there... however the game won't let me use them and says I have no colonists available.
On a related note, Grant Passage to Colonists to Staging Base.... does NOT have the "your doffs are gonna die" warning.