1)
In what way were they not separated?
1.
Radak #1: They did not separate from their nation. They did not flee the war, even though they knew that they will die in war.
2.
Radak, Malbim: They died like one (without conflict), just like in their lifetimes, they loved each other. 1
2)
How were Yehonason and Sha'ul faster than eagles?
1.
Rashi: To do their Creator's will.
2.
Malbim: They ran quickly in war.