XBT please help! What if original I485 Receipt Date is not given

My I485 and I 131 reached at NSC on Jyly 2nd. The check is finally cashed. Based on the RC# shown on checks (could be wrong, since it is hard to read), my recept date is Sep 4. I am wondering if it will effect my application. The good thing is I did not leave the country in the last two months. Thanks!