Hi there, shit disturber
Just kidding. Welcome to the forums.
Seriously, I understand you're trying to reconcile the obvious conundrums created by the KJA/BH novels, but personally, I'd say your time and effort are worth better.
I think you'll also find that when it comes to entertainment, most people don't care about continuity even when they should. All people want is good product, right or wrong. Ultimately everyone, including the people making more books/movies, will ignore continuity or throw it right out the window. Many examples come to mind like the reboot of the Batman franchise, the restart of the James Bonds films, Battlestar Galactica re-imagined, Star Wars, Star Trek, etc.
So why bother trying to reconcile the lousy KJA/BH prequels to the original Frank Herbert Dune books when in a few years everyone will just ignore the new books anyway, if most haven't done so already (I know I have)? To my mind, the issue is not so much that merging the KJA/BH books to Dune is a problem legitimizing the awful prequels (but it is a problem, IMO). I'd say the much more important issue is that reconciling prequel trivia isn't worth your time and effort doing so. You are worth better, as is your time and effort; that's pretty much the bottom line.