In Arkansas you are only allowed to use the expungement provision one time. You can use it to expunge multiple felonies, but only if they are a part of the same case. I am afraid you are out of luck on the prior felonies. If you feel that something else needs to be done you can petition the Governor for a pardon.
Expungement laws vary widely from one State to another. You should consult a criminal defense attorney who practices in the State(s) where these matters occurred to find out whether you qualify for expungement.