It just a minor issue, so nothing to worry. I'm also put my spouse "' First Name, Middle Name, Last name"' instead of "'Last name, First Name, Middle Name"' on the form too. As long as your name as a applicant matching the name on Nat certificate it should be OK. I'm into week 5 right now since DOS received it on 1/27. Website say 5-7 weeks for expedited, so we will wait and see.