I think you have to be playing while signedd in to get the trophies . Or you have to atleast at some time sync with psn .
I do know once you get them you dont have to get them again . I got most of the offlines ones in my first playthrough . During my second playthrough (different file) none of the trophies i already had popped up again .
Hmm not sure then buddy . Come to think of it all the ones you mentioned I had a hard time spawning myself . The border patrols are not gonna be in an exact spot . I remember having to drive up and down the road a few times . The security vans are a pain to spawn . I would keep trying .
Maybe concentrate one at a time . sleep for a week then every day go to the same one .
Sorry i meant i see them on the social club but in game when i'm at the location where they are supposed to be nothing happen.
I missed the simeon event but i still have to do : "Bus Tour", "Security Van 8", "Snatched", "Abandoned Vehicle 2", "Arrests 2", "Border Patrol 1", "Border Patrol 3", "Car Theft 2", "Chase Thieves Country 1", "Domestic" and "Prisoner Lift 1".
What I do to "reset" the game is take trevor to his camper in sandy shores and sleep for atleast a week (save 15 times .. you dont have to save just lay down )
Take a taxi about a block away from where the event should spawn . Do a quick save . Head toward the event location . if it does not spawn pause reload the game and try again . If it still does not work try this at a different location . I do not know if events are time sensitive .