Generated Timestamps are different in Editor than in Lesson
I think it is something with bitrate. Mp3 file come from Audacity because I had to split it so generated timestamps are okay and lesson has less than 2000 worsd.
I have had the same problem with arbritary audio files. It is unrelated to audacity. In my case I had to refresh my cache. This might be the case for you too. If the difference remains after a refresh cache (or remove cache) then the problem is likely different. Hope this helps!
I checked that specific lesson and it looks normal to me, I can’t see any difference in the Editor and Lesson regarding timestamps. Do you still have the same problem? Did you try clearing cache and @gbonnema suggested?