latest presentation questions

Seems by the latest presentation that things are progressing well but it raises a question.
On page 6 it says that the landholding is 1,740 Km2 and the area previously marked as EP143 is missing.
Previous reports have given the total land holding as 3755Km2.
RP2007-363 in now MRP2007-363 and is 489Km2 smaller
The same goes for MRP2007-362, even ER92 is smaller.

Does anyone have any idea whats happened?
Have we just returned what is seen as non productive land given that there is a better understanding of the geology.