It would be much easier to diagnose the problem if I could see it. Can you post some screenshots?

Well, it's per vertex, and each vertex is lit by it's position; so the origin of the model only applies to static lighting. make sure that you are actually using a dynamic light, and not static lights (WED lights). Dynamic lights use an action (included in the file) for dynamic lights.

Also, shaders interpolate the normals of the vertices (unless specified by shadeMode = flat;), so using block objects might return bad lighting.