It took me 24 hours but I think I got it figured out: All the databases need to have the SAME delimiter.
I was using different delimiters for categories.db (pipe) and links.db (tab). I was using a tab for links.db because I can't export from my database program to pipe delimited (and back for easy offline editing). When I did a massive search and replace to changed to pipe, uploaded, and rebuilt, everything worked fine.
I was using different delimiters for categories.db (pipe) and links.db (tab). I was using a tab for links.db because I can't export from my database program to pipe delimited (and back for easy offline editing). When I did a massive search and replace to changed to pipe, uploaded, and rebuilt, everything worked fine.