I did use the Adjust Layout button.
Where would I find the "body pages overrides?"
I don't know how to "reapply the A-Master." Where is that?
The other files just adjusted all the pages in one shot.
If the body pages had overrides, they would ignore a parent page update (parent pages were previously called master pages). Right click a body page in the Pages Panel > Apply Parent to Pages > Apply Parent: A-Parent to Page All Pages.