Yeah Ill still look around the site if theres jsut anything that I missed and change all of the passwords for everything too I guess. Im out of ideas at the moment and maybe ill consider moving it. I know, people have been saying it should be on a dedicated but I dont have that much money to spare every month. If I did I would have.

Thank you all for the reply and the help.

EDIT

What Im thinking of is it may be jsut a harmless thing, but the fact that they can write to a file and as php its... Ill observe and check it everyday from now on. What im worried about is also waht wildhoney said, that it may not be form related at all and its something that I cant control or do anything about.