There is one other way to explain this: Destiny does and does not exist at one given point. It exists at all points in the future, if at all. Destiny will only exist if one believes in it, and only for that person. It is more a question of whether or not destiny exists. I would shudder, personally, to think my life was completely planned. I would hate that because i am a free will kind of guy.
I think number five gets into the whole string theory and quantum mechanics and in the end, None of that may or may not be true, so we have to take a step back and assume that everything is happening at its own distinct time which may not be true.