Exporting to a pdf file

I work with Multi Ad Creator (at a newspaper) and prior to sending the file to the publisher we need to convert it to pdf ( we click on the file and so to file, export, pdf).  There has never been an issue doing this but there is now!  When the file gets converted there is a two lined-four sided graphic on the top of my file that I cannot seem to get rid of - what have I done to the program and what can I do to fix this??  The paper ended up being printed with these graphics on them which is not good!