It’s a bug of some kind, but I’m not sure what is causing it. I don’t aggregate abilities for pre-Legion logs, so it’s possible (but would be very odd) that the uploader thinks the log is pre-Legion. I will probably need an original log file to investigate, since the uploader makes the version determination from parsing the original file.
It’s a very confusing bug. I did manage to verify that the uploader mistakenly believes your log files predate Legion. Something about the format is preventing it from thinking it’s a modern log.