it's obvious to me also.
we are supposed to find something about this one year delta
how many times do you mistake the present year for the previous one in june and/or july?
there were at least 3 guys at gitmo and Q (which is assumed to be more than one person).
none of them caught it as a mistake or refer to it as a mistake?
barring an explanation from Q, the only conclusion is that it is intentional.