When I submitted mine, I had my name and which essay of the three it was in the header, which is outside a one inch margin. They didn't care about that and still evaluated my essay. That said, in your case, part of the actual essay is outside the margin, which could pose a problem. However, if it were up to me, I'd leave it go since it's only two letters and not the entire essay.
Questions: did the tex editor change any of that chunk of the text into italics or weird-looking? It would make it more obvious to the people evaluating the essays that it's not your fault and it was the tex editor. This may work in your favor. That sentence would probably be ignored by the reviewers. Also, did you fill up the full two pages allowed? If there is a good amount of white space left, then they may leave it go since the essay would have fit into the two pages were it not for the tex mistake.