Where are my leaders? I did what I've done before (in the reference page - inserted a tab and updated to have dots) but it seems to have no affect to the body page
Did you regenerate? It won't take effect until you do.
I saved, I re-generated, I incanted, I prayed etc.... Nothing...
Check your tab stops. I'm betting they're outside the edge of the text frame on your body pages.
(unless praying already brought 'em back!)
It seems that setting the tab stop and ALSO clicking the Update Style button in the Paragraph Designer provided what I was looking for.
Yes, always avoid the overrides. Keep checking the lower left corner of your screen for the dreaded asterisk that indicates an override.