A desktop publishing application from Microsoft that focuses on page layout and graphic design.
Sounds like you excluded the first page when you applied the MP.
Go to Page Design tab > Page Background group and click down arrow by Master Page, select Edit Master Page > Apply To and check down arrow > Apply Master page dialog and make sure that either all pages or Pages 1 to your last page is checked and OK out.
You can also go to View > Master Page to edit it.
DavidF