<p>I submitted Columbia supplement essays yesterday, and I skimmed through them again five minutes ago.</p>
<p>Of the eight essays, I found one grammatical error from the question of listing films, concerts, and lectures.</p>
<p>I wrote that [I attended to 'Blah Blah' (Lecture from the Climate Change Center),]
Preposition 'to' should not be there... (it even changes the meaning :() Probably I missed this error while I proofread this short essay fast.</p>
<p>However, I bet there is no grammatical error on other essays and main essays are fair enough.</p>
<p>How might this error affect my admission results?</p>