1)
Why did he say "Asisi"?
1.
Radak #1: I accepted her words according to your command.
2.
Radak #2: An accurate text says that we pronounce this "Asisa." You caused this, via sending her - go return Avshalom like your word. Malbim - one who starts a matter, we tell him to finish it 1 !
1
Yerushalmi Pesachim 10:5 says so about Mitzvos.