Once you've filled up the blank area above the manual page break, you'll have no option but to start a new page. You might be able to minimise the impact of that by deleting the manual page break so that the content previously starting on the next page moves up a page. At some point, though, you'll have to accept that you've run out of space to add content without substantial repagination.
I suggest you also read about the pitfalls of using revision pages at:
I want to include the chapter number with the page number in the Header -
how can I do this?