Whenever I try to bend the shape to a curve, the object ends up losing its form. Think of trying to bend a rectangular plane to a C-shaped curve. The rectangle will lose its “squareness” when it gets put through the shape bender.
Not quite sure what the link you have in your post is, but it is not a SKP file nor an image. You may want to try posting again, so we can give you a hand.
If that’s what you’re referring to, ShapeBender gets a little over-zealous with Soften/Smooth sometimes. You can quickly fix it by opening the bent component for editing. Select all of the geometry, right click on it and choose Soften/Smooth. Click outside the component to exit the edit mode. You may need to soften coplanar or better yet, erase any coplanar edges.