<p>Don’t worry about it. For a couple reasons.</p>
<ol>
<li><p>The way that admissions offices work, the people who make the decisions do not see your individual score reports, which say when, and how often you took the test. These numbers are compiled onto a card by an intern, and only the highest scores are put on that card. If you took the SAT 6 times, they wouldn’t neccesarily know, but that piece of paper is in the file. In other words, the test score data that they look at for you has already been superscored by someone else.</p></li>
<li><p>Even if they do see it, If you got a 780, and then a 500, they will probably assume that you were off by one bubble going down the line (happens to a lot of people) and just disregard it anyway. The 780 is what’s important, they know that flukes don’t lead to 780’s, flukes can lead to dramatically lower scores though.</p></li>
</ol>