Totals don't add up between totals by system and totals by type

[PanssariInsinoori]

These are nice datasets, though it seems that there are some problems in the totals by system datasets as there seems to be much more observations than there are in the Oryx site or in the total by type. First I thought it could come from the observations that has more than one status. That did account for a difference of 1000 observations or so, but there still is a difference of about 1800 observations between the datasets totals by type and totals by system. Is there some known reason for this?

Great work and still the best dataset that I have found for this data. Keep it up.