You have the power door lock curse. My car and many others have suffered from it. My locks started acting funny and sometimes I would get locked in my car or I would lock one door and the opposite door would open and so on. Sometimes they would lock sometimes they would unlock. Yours are probably cursed just like mine and many others. I tried replacing the fuse and other stuff but still have had the problem. The best thing to do instead of trying to figure it out is to live without power locks... take the fuse out and presto manual door locks. I hate it but got used to it.