There the border will turn from Azmon to the Brook of Egypt, and then its direction is to the sea. ¹ 

It then crossed to Azmon, extended to the Stream of Egypt, ¹  and ended at the sea. This was their ²  southern border.

and then the border will turn from the south to the Scorpion Ascent, ¹  continue to Zin, and then its direction ²  will be from the south to Kadesh Barnea. Then it will go to Hazar Addar and pass over to Azmon.