I'm going to mark this as a bug because I don't think this should be intentional design. I understand it may have been coded that way but I feel the code is a bit lazy.
"Members cannot be kicked out during Expedition."
This person has been offline for over 10 days. They have not even participated in the expedition. I understand that people that have participated in the Expedition shouldn't be kicked but this guy hasn't even signed in for reset.