Your screen shots don't show up here so we need to guess what the issue is.

Firstly, you need to look at whether the section breaks in your document are all required and what the page setup is for every one of those sections. Each section has its own page size and margins so you need to make sure every section's settings are what you expect.

Secondly, you need to look at the paragraph settings when things 'go off the page'. Typically, this might happen if paragraphs are set with a negative indent which exceeds the page margin. If you have done this with local formatting, you can resolve it by selecting that content and pressing Ctrl-Q. If you have done it with style formatting, you can modify the relevant style definition.

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Andrew Lockton
Chrysalis Design, Melbourne Australia