As long as the errors aren't egregious, you might get lucky and they might not notice. Either way, nothing you can do about it now, so dont worry about it and move on to the next app (I know that sounds harsh, but the application process really is a story of survive and advance). Im sure yall do just fine overall however.
so i did nearly the same exact thing on my amcas. gleevec is right--nothing you can do about it now--you just have to move on. i was debating sending in a corrected version to the schools...but i don't want to call any more attention to it than i have to. it looks like a mistake amcas could make, i suppose...and there are quite a few errors on mine actually mad: i can kick myself, don't know how i let it happen)
so don't stress too much about it--if you feel really bad you can always send a corrected version to the school.
It's not a big deal. I had stuff show up blank on my AMCAS and had to send letters to each school to get it put on there. I found some spelling errors in secondaries after I'd sent them (guess I should proofread more than once), but it was never an issue and I still got into some of the schools. I wouldn't worry about it, they are reading tons of essays and a few minor errors won't really set you apart negatively.