1)
Why does it say here "va'Ya'asu ha'Leviyim", and in Melachim II, 11:9 "va'Ya'asu Sarei ha'Me'os"?
1.
Malbim: Here it discusses primarily those guarding inside. There it discusses primarily those guarding outside.
2)
What is the meaning of "Lo Patar"?
1.
'Rashi', Radak: Usually, the leaving Mishmar goes home. Yehoyada did not let them go home. Rather, they must stay to guard the king. 'Rashi' ? this is like "ba'Leshachos Peturim" ? they are called so because they are exempt from all work; they need only to guard the Azaros.
