The information was clearly relevant to the immigration authorities.
But Im sure no honest and principles gov employee would ever do anything wrong in regards to Zeros ineligibility like doctor FOI documents, no of course not, couldnt possibly happen.
Even if your speculation (which seems quite paranoid to me) was accurate, or even if the memo is real but based on false testimony by Barack Obama Sr., that is still not proof that SAD was in Seattle in August 1961.