I can see your interpretation as being 'possible', but that is NOT how the "Style for following paragraph" setting works. It doesn't enforce the subsequent paragraph - it merely changes the style for the following paragraph ONLY IF you put your cursor on the end of a paragraph and press Enter.

Once the subsequent paragraph exists, there is no restriction from anyone changing it, and modifying the above style won't change any following paragraphs anywhere in the document.

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Andrew Lockton
Chrysalis Design, Melbourne Australia