1)
Why does it say "v'Chasuv ba'Sefer v'Chasum v'Ha'ed Edim"?
1.
Malbim: You say that the land is "Nitnah b'Yad ha'Kasdim" - then people fear to buy with a document and witnesses, lest the kingdom hear that he considers it his acquisition. Just the contrary, people will buy with documents and witnesses!
2)
Why does it mention the Har, Shefelah and Negev?
1.
Radak (36): All of these were in Yehoshua's portion, like it says in Yehoshua (15:8-9, 33, 21).
