Since you have a pic, put it in a paint/editing program and use it to evaluate your tiller (draw ellipses, circles, etc).
hard to tell for sure about the overall tiller not knowing the profile/dimensions of your bow or an unbraced pic, I'm pretty sure you have a hinge on the left side and one developing on the right, both about 3/4 of the way out.
Don't touch the hinged areas, remove wood on both sides of them until it's all even.
Is that a glued on riser?