What are the taxonomic changes - gains and losses - since the 1998 record? How many would that have added to Sandy Komito's total?
Don't know the answer, but such attempts have to be on the basis on the status quo at the time - many factors change over the years, not least the far better bird alerts today. I guess changing taxonomy has to be considered just one of those factors.
Additionally, Komito may not have bothered with races, etc, anyhow that were later to become species. Likewise, Neil is probably basing his strategy on full species too. Anything which gets split or lumped in subsequent years just can't be part of the race.