I've observed something quite annoying when you vote a mission in and then suddenly vote to cancel. This may be as designed, but I've noticed that once you've canceled a purchased quest, you lose what you spent of it, and it goes back to the guy at the Sanctuary. You then need to re-purchase it all over.
LOGICALLY... the mission quest should enter into a cue bin ON YOUR SHIP, if you vote to cancel, especially if you're doing single player. It's redundant to have to turn all the way around and go back to the Sanctuary to REPURCHASE again :/ Just my $0.02... keep the change!
