Yes. You have to make sure everything is perfect - grammar, typing, everything. In my SOP to WashU, I accidentally had some cut and paste text from another university at the bottom and let's just say they were the only school that straight out rejected me out of the 9 I applied to. Bummer because it was my first choice, but what can you do? Bottom line - make sure your SOP is perfect. You seem to have some grammatical errors in your posts, that's why I brought it up. Good luck.