Thanks, this is really helpful! 🙂
I think I know exactly what happened, haha. Back in May, I reuploaded most courses and automatically migrated everyone's progress from the old courses to the newly uploaded ones. When reuploading the courses, I accidentally got the Word and Definition columns backwards for about 75% of the courses. The columns also sometimes ended up being in the wrong order (e.g. The first column is "Definition" and the second column is "Word", instead of the other way around).
I've been holding off on fixing this because once it's fixed, people will need to click a different testing direction than they have been, and I don't currently have a good way to notify people of this. I hadn't thought about the fact that for courses with audio, having the "word" and "definition" columns swapped is a big problem! 🙂
Your post has prompted me to get started on merging the forum and mylittlewordland.com account systems, so that after fixing courses, I can directly message people on the forums to let them know of the changes 🙂