1)
Why does it say "Becha Chasisi"?
1.
Radak: I trusted in You, and not in help of people. Therefore, save me from all who pursue me, who agree with Sha'ul.
2)
Why did he say "Hoshi'eni" and "Hatzileni"?
1.
Malbim: Hatzileni is after he was caught in the hands of those who set traps for him.
