1)
Why does it say "Ki"?
1.
Radak: Nine and a half Shevatim received via the lottery, even though Levi did not receive, because Yosef counted as two.
2)
Why does it repeat "like Hashem commanded"? Also verse 2 said so!
1.
Malbim: Also other details were like Hashem commanded, e.g. "la'Rav Tarbeh Nachalaso."
3)
What are Mikneihem and Kinyanam?
1.
Radak citing Targum Yonasan: They are their big (work) animals and small animals, respectively.