Gh50, your case is different, there was a mistake in filling your name on the form. KCC has advised you to do the right thing, I believe correspondence with KCC are kept on your file and will be sent to where u will be interviewed, so it won't be a problem. You need to take that affidavit with you since there was error on your initial E-DV form, you can provide the affidavit in case they raise any red flag on the inconsistency of your names. You will be fine, I believe it is a minor error, they may or may not ask any question on it.