Remove first blank page

Hi,

I have a document which has two master pages, the first is portrait and the second is landscape.

Certain conditions in the form cause some pages to become hidden, it all works perfect except for this:

There is one condition which requires the first page to be landscape, the pagination of this page is set to be on master page two. It works correctly, however a first blank portrait page is displayed, is there any way to prevent this blank page from showing up?

Thanks