Hi
I'm using Microsoft Word Professional 2019.
I am trying to insert Section Breaks Next Page in a document, so that I can create different headers with 1, 2, 3... in some and i, ii, iii... in others. (Essentially, this: https://askalibrarian.csuohio.edu/faq/43427 -- has worked for me in the past on other docs.)
But Word is simply refusing to put in Section Breaks Next Page. I'm on page 4, I select Section Break Next Page (NOT Continuous):

And it puts in a Section Break Continuous:

(Or sometimes randomly it'll put in a Page Break instead. I can't see any pattern to what it adds, but it's not what I tell it to.)
Plus, on page 3 up above this, I had been able to successfully put in a Section Break Next Page, and now when this one on page 4 goes in as Continuous, then the one on page 3 has also changed from Next Page back to Continuous.
I am copyediting another person's dissertation, so I don't know what he did to the page numbers before I got it. He had the page numbers in the footer, incorrectly, so I just Removed his page #s entirely and tried to start from scratch, but I think there is some weird setting from his editing that is not letting me do what I want.
Any ideas on how to fix? This is driving me crazy! Thank you very much.