1)
Why does the Torah not tell us how Moshe distributed Eiver ha'Yatden among the two and a half tribes?
1.
Ramban: The Torah does not want to go into deta il regarding these tribes, 1 since it is unable to do so regarding the other tribes.
1
Ramban: Though in Devarim 3:13, for some reason, it does describe how Moshe gave the entire area of Argov and all of the Bashan to half the tribe of Menasheh. And in Yehoshua, 13:15 & 24, the Pasuk describes how Yehoshua distributed the rest of Eiver ha'Yarden among Reuven and Gad.