They may or may not be needed. Running the following macro will make the page numbering continuous.
Code:
Sub ContinuousPageNumbers()
' Jay Freedman
' http://answers.microsoft.com/en-us/office/forum/office_2007-word/page-numbers-are-all-fouled-up-in-my-large/d188687e-9663-43e0-a450-1dbadc47f09f#last
Dim secNum As Long
With ActiveDocument
For secNum = 2 To .Sections.Count
.Sections(secNum).Headers(wdHeaderFooterPrimary) _
.PageNumbers.RestartNumberingAtSection = False
Next
End With
End Sub
See
Installing Macros if you need help on how to use the macro.
Section changes can be for columns, page orientation, or margins changes.
Sections / Headers and Footers in Microsoft Word 2007-2013