Datum POB
There was 1 infant on board. That explains the difference.
Another thing to keep in mind is that there was 1 technician on board (his role is not explained - in other cases he might have been included in the number of passengers, just like 'hitching' flight crew that are not relief crew). The usual reporting is a crew consisting of the pilots and cabin crew. In this case 2 plus 4. Making up a total crew of not 6 but 7.