As you can see at the bottom of the anvil are a little bit more shape down there, I am sorry I forget what you call them, but if some one could help me and get rid of them, that would be nice.
3 Answers
(Left)
If you have a bottom face which is a large Ngon with a concave edge, Catmull-Clark subdivision will cut the corner,even if the face has holding loops on its perimeter.
(Right)
You need to give the subdivision convex faces to work with, preferably quads. I seem to remember Andrew's Anvil does it like this.
It looks like you have a face that isn't perfectly flat.
Try selecting it and pressing Ctrl-T to triangulate it.
The problem is the amount of Vertices, I think, but what I am trying to say is that when I UV unwarp an object like this, it needs to have 4 vertices for each face and this is more than four vertices per face.