Help Flattening Lofted Bend

I'm wondering if someone can help me figure out why this lofted bend won't flatten. I'm pretty sure that it's some minor issue I've overlooked, but I can't seem to figure it out. I know that it's more than likely the two ends that are causing the problems, I'm just not sure how to get the shape I want and get it to flatten.

Thank you.

SolidworksSheet Metal