@mokane99 What you describe is what happens if you create documents the way Adobe thinks you should, but, let’s face it, Adobe are imbeciles. Yes, it sounds very sensible to start with a new ‘book’ consisting of a whole load of documents but long experience has taught me that this creates all sorts of problems. Create the whole publication as a single document and all this reformatting is massively simplified. You can tag chapter openings to begin new pages in the epub. Yes, Adobe CSS isn’t the cleanest in the planet but just look at the mess Scrivenor, Nisus and Word make.
To be honest, it’s quite a while since I created an ePub from LaTeX and I can’t remember exactly how I did it, but it worked pretty well.
The current price of Oxygen XML Editor Personal is $198. I’m still using version 14 because I haven’t felt the need to update to 19, but if I do it will cost $84.