I'm not sure if this is a bug or a feature that I don't understand, but for some reason if you have a "style" selected in the paragraph style floating menu, any style, it's not particular, even [basic paragraph] will work, and then you go to save the file as an EPUB, next, select the "advanced" tab where you can select a paragraph style for ID to split your document, that style, and whatever style that it was that you have selected, will not show up in the available list.
I spent a half hour re-naming my style, creating a new one and checking the contents of it, spacing, colors, is there something strange in the style that causes this and then finally, I accidentally de-selected the style from the floating menu and the selection just popped up again in the advanced tab. Really? Can't be? I re-selected the style in the floating pallet, went to save as EPUB and it was absent. Opened up a half dozen files to check whether it was one lone file and it happens in them all.
Is there some reason that happens?
That’s interesting. So if you have no style selected they will all be there as a choice for breaking the document?
You are referring to CS6, right?