You have worked painstakingly on your application. You have checked and rechecked your work. You finally press the Submit button, and then you discover—to your horror—that you are missing a comma and you inadvertently used “too” instead of “to.” The admissions committee is just going to throw your application out, right? Wrong.
There is a fine line between a typo and pervasive sloppiness. If you have typos and grammatical errors everywhere, you send a negative message about your sense of professionalism and your desire to represent yourself—and thus the target school—in a positive way going forward. If you have a minor mistake or too (oops, we meant “mistake or two”) in your text, you have an unfortunate but not devastating situation on your hands. Admissions committees understand that you are only human and, if you are a strong candidate, the entirety of your professional, community, personal, and academic endeavors will outweigh these blips.
Do not dwell on the mistakes. Do not send new essays. Just accept your own fallibility and move on.