Help needed regarding SAT score send.. (It's too late)

I just realized from one of the posts that we need to submit the official SAT score to Princeton instead of just self-reporting on the Common App. So I have two questions. One is, is it okay if I submit rn as it will reach after Princeton's application deadline. Second, do I need to send all of my scores? As my older score is not so good. My latest is 1470, whereas the older one is 1400. So will they know that I have taken more than 1 SAT if I only send one score and also only report one in the Common App?