I am very new to the whole ebook-game but googling for some hours didn't help me to fix my problem, therefore I hope I can find help here
I have a pdf and because of its layout, a pdf-to-text-conversion doesn't work at all (it has 2 columns + several text boxes). Therefore I used Apple Pages which has a new feature for creating epubs (because of the iBooks.app).
So I started copy and pasting and created the epub which looks fine in Calibre, Stanza etc.
But having a Kindle, I need to convert the book to mobi. For this I used Calibre (therefore I hope that this is the right sub-forum

).
When I open the mobi on the Kindle (or the Kindle Previewer) words get always wrapped. "senseless" becomes "senseles\n s" for example. There are only line wraps when there's an end for a paragraph.
When I open the mobi in Calibre, there are no line wraps (except for the paragraph-ends) and just long long lines. I tried fiddling in the css of the epub with the help of some correctly displayed files but this didn't help.
What could cause the problem?