1)
Why does the Torah not insert the word "ve'Chol Sarei Mo'av" as it did earlier in Pasuk 6?
1.
Rashi: Because some of the officers realized that there was no chance of his cursing Yisrael, so they left. 1
1
See Oznayim la'Torah, who elaborates.
2)
What are the implications of "Mah Diber Hashem"?
1.
Rashi: Balak was mocking Bil?am, in that he was not his own master and could not say what he wanted.