OK, folks, seriously? Sounds like it's time for a bit of a reality check here.
It says on the first page of
Dune that Paul was born on Caladan. Anyone who has opened the book even once has probably read at least all of that first epigraph. So both Kevin and Brian know the "fact". And Brian grew up in the home of a man who named a boat "Caladan", and he has indicated in writing that he knows the origin of that name.
It's fun to jump up and down and yell booga booga at the Hacks and call them idiots every now and then (Gawd knows I do it often enough!

), but let's don't start believing they're TOTAL idiots just yet, how's about? Because the truth in this situation is much more damning.
They didn't make a mistake here. I refuse to believe that two human beings who have lived as long as they have, drawing breath without swallowing their own noses, could be stupid enough to make an error like that. They saw a chance to be "creative" (in their minds) and ran with it.
Turning
GP's comment above around a bit, this isn't a blunder in some throw away passage in some transitional connecting "chapter". This is an intentional change upon which is based much of what they wanted to introduce into the McDuniverse (the Piter gholas, Irulan as a flawed or manipulative/biased historian).
In this case at least, let's not make the mistake of underestimating the enemy. They aren't (can't be) as stupid as we'd like to think them. I fear they are quite cunning at times. And as long as they can make a fast buck, they obviously don't care what they do to Frank Herbert's Duniverse.
So one observation does remain true: THEY ARE BOTH EXTREMELY SHITTY WRITERS.

"Let the dead give water to the dead. As for me, it's NO MORE FUCKING TEARS!"