I think my projections were quite right (= #1000 DID NOT complete the word by 31st dec 2004, rather, he/she completed between february and march 2005).
From a post Joy wrote on DZ on 16 March 2004:
"BASE # 1000 has not gone out of this house yet. We are waiting the 30 days to make sure it's the next date. Rick and Joy Harrison"
So, indeed, Mr/Mrs/Miss BASE #1000 has actually completed the word B.A.S.E., let's say, in March 2005 (beginning?) and so it applies the (right) rule to wait 30 days to appoint ANY number officially, just in case someone wrote his/her letter with few days of delay (with respect to completion) and/or mail from different parts of the world hits Texas in different times.
We will know something about Mr/Mrs/Miss BASE #1000 in April 2005, then