Thank you for checking your copies of the movies. My guess about the Warner editions is that there simply wasn’t motivation, time, budget, and/or interest in doing the job thoroughly. It’s possible some of the prints have been damaged over time and there wasn’t a budget for restoring them, so they just decided to re-use segments that were in good condition. Not every restoration project gets the same amount of love that, say, Nolan devoted to the recent 2001: A Space Odyssey prints.
As for the downloads, I changed to a new web host and they came down at that time. I’ll see if I can put them back up elsewhere.