When I was doing my K1 and AOS, I lost one of my two middle names. As the Social Security agent told me (while getting my SS Card), it did not fit, and I had to choose. Ever since then, I have been using one middle name legally everywhere. But after I submitted the N400, I thought about it, and I would like to have it back. Was this person at Social Security right that I can only use one? Can I still request a change?