Hi Ben,
I'm surprised it didn't work, are there any other keep with next/previous settings already applied? Strange pagination results can happen if the keep settings are applied to too many paragraphs. The reason for suggesting the use of keep with next in your case is that it limits the number of paras that are controlled by the keep settings. For example if every para in a flow has keep with previous Frame may try to keep everything together, but fail and give you an unexplained empty page somewhere in the document.
The advice to import your changes into other documents or templates is just good housekeeping. It's very easy to forget this stage then wonder why the same problem pops-up again in another document. Then you have to remember where you fixed it previously
. It doesn't matter where you update the style in the TOC file because you are only changing a different instance of the same Paragraph Format, the end result is the same.
Regards
~ Ian