The table gives the mid-point (1.6242). The buy and sell rates are the bid/offer and are 1.6239 and 1.6244.
I would not worry about it because this was in the time of the previous examiner. One of the reasons that he is no longer the examiner is because of things like this. The new examiner does not do this sort of thing (and the new examiner took over in 2010).