1)
Why does it mention here where the Kohanim and Leviyim dwelled?
1.
Redak: Eretz Yisrael was not given to them. Hashem is their inheritance! They are for Avodas Hashem - singing and Hakravah. They received cities due to their Avodah.
2)
Why does it say "Lahem Hayah ha'Goral"?
1.
'Rashi': Kohanim and Leviyim received cities from each Shevet, based on a lottery. Here lists first their cities in Yehudah, for the lottery first gave Yehudah's portion to Yehudah.
