It was obviously a brain fart on my part, and clearly mostly my error. I reuploaded the files, and all is well. Obviously, the tip-off should have been that if I only got 21 metadata fields instead of 25, the upload was buggered. The whole thing feels easier now. The first time I had to FLAC and generate ffp and md5 files, then upload, I thought, man, this is work. Now it seems pretty quick and fast, since I've gotten a truly broadband internet connection.
Anyway, thanks SM, and everyone. Still learnin'.