<p>I think you should send the SAT II scores, for sure. WashU encourages you to take the SAT II tests, so you should send them. If you do, your SAT I scores will also be reported. But I wouldn't worry about it, because they will take your highest scores. It can't hurt you, it can only help you. Send them in.</p>
<p>P.S. I don't think(but am not sure) that colleges can superscore the ACT.</p>