1)
Why did Gid'on request another Os? He already received a sign (acceptance of his offering)!
1.
Malbim: Refer to 6:39:1:1. It is because his generation did not deserve salvation. Even though his city abandoned Ba'al, other Shevatim served it (most men kneeled in their knees - 7:6). He asked for a sign that his small merit would suffice.
