The achievemnt Altruist Acolyte were you have to deliver an uspuspecting victim will not work for me i have picked up about 10 different people including the ones from a video tutorial i watched but it never tells me me about the cult in the top left of the screen nor does the symbol appear on the map and when I drive to the location they will not open the gates. Anyone know why this is or if I have to do something before hand?

Btw I have completed the story already

+rep for any help

Edit: just realised you must be Trevor and I was trying as franklin :I