1)
Are all of these Roshei Batei Avos of Tola? We find that Bnei Uzi are counted by themselves!
1.
Malbim: Only Bnei Yizrachyah ben Uzi are counted by themselves. Uzi's descendants from his other sons are counted with Bnei Tola; they are one of the six Roshei Avos of Tola.
2)
Why does it specify Giborei Chayil regarding Bnei Tolah?
1.
Redak: They were more valiant than Yisachar's other sons.
