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It appears that the game is set up for For a to dual wield, but I don't think her feats are quite right. She has Ambidexterity and Dual Wield. Dual Wield, however, is the ranger version dependent upon class and light armor. When equipped with appropriately light weapons (even in light armor) she retains heavy penalties for dual wielding.
I'm guessing that she should have Two Weapon Fighting instead of Dual Wield. Does that sound right?