Has the FAA changed its policy, or have I managed to become a National Security Threat?

I got a bounce-back from the FAA when I tried to register my newest
sailplane acquisition. Seems I did not sign below my written name on
the Application for Registration. My bad. I printed my name and sent
it back to them.

I got a call this evening from the gentleman I bought the plane from.
It seems he got a letter from the FAA saying they understood he had
sold the aircraft and as a matter of National Security, he is to send
in the old registratioin withing 20 days of receiving the letter.

I do not yet have the registration with my name on it, nor did the FAA
issue me a letter to keep with the plane to be a temporary
authorization to continue operating the aircraft. We both suspect the
old registration is in the plane (as it should be), as he did not keep
it and I do not have it with any of the other papers for the plane.

So, have any of you sold an airplane in the last two or three months,
not sent the registration in saying you sold the plane, and gotten a
letter saying you must return the registration "To Preserve National
Security"? Or have I made their "special" list?

Steve Leonard