How To Delete The Page In The Middle?

Well, if you're deleting content that spans portrait and landscape pages, but the first & last pages have different formats, how is Word supposed to know which one you want to keep?

Beyond that, see: https://www.msofficeforums.com/20227-post6.html

Why would section breaks help? They have no effect on page orientation?

An observation: if you need this level of control over the layout, then you should be using a desktop publishing app designed to make page layout flexible rather than what is still, underneath it all, just a word processor. Maybe import your text into Publisher and do the layout there?

Originally Posted by zanshin777

Does Adding Section Breaks fix this? Maybe I'm doing something wrong.

You cannot have different page layouts without the use of Section breaks. In other words, they must already be in the document. So you need to be more selective about what you're deleting.

Clearly, you don't understand how Word works. That's a recipe for disaster whenever the page layouts change - which is precisely what this thread concerns.