How do saves work in Grand Theft Auto V?
Solution 1:
The game will load the game with the latest date / time stamp so a quick save taken 30 seconds after an autosave will still get loaded.
Both autosaves and quick saves will load you into a spawn point, usually something to do with your current or next mission. This is often, but not always the same character you were when you saved and most times, it is at their respective house but I have spawned on the side of the road near my car in a number of places around the city.
Not 100% sure on this one but I don't think you can load specific saves, only replay missions. I'm guessing it was done this way to stop cheating / end wanted levels if you try something and get caught.