OK. Looks like I'm making progress. There's something about selecting options for Paragraph Styles creation that is clearly wreaking havoc.
The "Reset to Base" option, and 'Based On' and 'Next style', in combination with "No Paragraph style" and "Basic Paragraph style", I'll have to go back to the User Guide...
Sounds like you other styles are based on the title style, so any attribute that you didn't change from that is going to update when you edit the base style.
It's big mess, Peter. Now that I have "figured" it out, presumably by hitting on the Reset to base button -- an even then? -- I don't dare trying to recreate the conditions that led me into this mess in the first place.
Follow-up question, if I may.
I'm trying to think out loud to my myself. Would it make any sense to combine a Table of contents witha Numbered list?
Why would I want to do that. In the case I wanted to do a hierarchically numbered table of contents..,
I know, Bob Sprinhurst has a whole demoing this very feature on his site. Ought to check it out again...