1)
Why did he say "Iti Ya'avor Kim'am"?
1.
Metzudas David, Malbim: In any case I wanted him to come with me, to do good to him.
2)
Why did he say "E'eseh Lo ha'Tov b'Einecha v'Chol Asher Tivchar
1.
Metzudas David: What I do for him is not considered your reward. (Therefore, I will also do for you whatever you command.)
2.
Malbim: You said that I should do to him as is good in my eyes. I will do to him as is good in your eyes!