Why did they cross the Yarden?
Radak: They first counted the Shevatim in Ever ha'Yarden.
What is "Yemin ha'Ir"?
Targum Yonasan: It is south of the city.
Radak: It is outside the city.
Why does it say "b'Soch ha'Nachal"?
Radak: Where they camped was in the valley.
It seems that Targum Yonasan explains this like 'in the Nachalah (inheritance, of Shevet Gad). Perhaps Radak hints to this. (PF)
Why does it say "ha'Gad"?
Rashi (from Yalkut Shimoni 145): [Yo'av] began with Shevet Dan, because they are strong. He hoped that they will [resist, and] fight him, and the census will be canceled!
Radak: "Gad" is like "Malei Al Kol Gadosav" (Yehoshua 3:15).
Why does it say "v'El Yazer"?
Metzudas David: After, they went to Yazer 1 (another city of Gad - Bamidbar 32:35).
I do not know why the Navi records this, nor why Targum Yonasan makes this one word 'v'Elyazer', nor why Yayin ha'Tov puts Nekudos to pronounce this 'v'Eliezer.' (PF)
