New Job Option not remembering page size

I have been trying to create two new page option files that I can use when creating a PDF for the UK and US markets. As the page size differs I do not want to have to remember the exact dimensions. Having set-up two identical files apart from the page size I try to use them but the UK print option file always default to the US page size in the PDF Set-up  dialog. Any ideas why?

If you need further information I am using FrameMaker 9 and Distiller 9 as part of the Acrobat Pro Extended in TCS2.