Was doing the FileMaker Missing Manual book, and set up one of their samples with a series of payments and proper running balance in a portal. Perfect.
Duplicated that structure in my prototype, worked great.
Changed out my single field of +/- payments, in favor of debit/credit fields which feed into a Net calculated field, which then drives the running total. Now it's showing the grand total (for the portal's related record set) in each row of the portal, rather than the incremental running balance.
I keep going back and forth between the files looking for differences in my configuration, even tried going back to a single +/- field instead of the calculated one, but no go. Portal is a vanilla related records, sorted on the date. File built from scratch in v15. Suggestions to fix??