Social security update after getting USA citizenship.

I got my USA citizenship two months ago with my both parents. Today, my father and I went to a nearest social security office to update our cards. They told me that they have to verify my information that I gave them. I provided them my citizenship certificate, SSN, and driver licence. My card will take about 4 weeks. They found everything good for my Dad and his card will arrive within two weeks. I attached the letter in this thread. I am really worried if there any problem with my citizenship.