"Levels" of ghost are just gradual LAs... not sure what the question is.
I guess I'm just confused on how buying off some of the LA works. If I'm instructed to build a level 20 character, I want the first four levels of ghost, and I'm allowed to buy off three of them, what happens?
If I wind up Ghost 4/Something 16 then why did I buy them off? to prevent being Ghost 4/Something 12?
Sorry if I'm asking something pretty obvious, haven't done much with LA/HD races.