Some epub formatting and specified fonts are lost after uploading epub to iTunes U and then opening it in iBooks
I have been using DropBox to test my epub in ibooks and just recently uploaded the epub to iTunes U because the file size was getting so big because of the videos for the course that DropBox could no longer open it. My "com.apple.ibooks.display-options.xml" file (specifying to use Helvetica) inside of the "META-INF" has been working all along while I have been using DropBox to open it in iBooks. But ever since I uploaded the same epub file to iTunes U and opened the book in iBooks, the font doesn't show up as Helvetica anymore and my paragraph styles are also being ignored. I checked my css files and made sure they all said Helvetica, because my formatting for my tables is the only thing now showing Helvetica. After I unzip and make my edits to the css etc. and rezip and upload to iTunes U, does iTunes U ignore or overwrite files you have changed inside of your epub?
This worries me that iTunes U seems to be having problems with this, and it makes me wonder if I am going about this wrong?
My file size is 129.2 MB and I still have some videos to add to the course. FYI I am creating this epub for the iPhone because we already have a version with iBooks Author for the iPad, but iBA doesn't allow it to open on the iPhone.
Any help or advice would be much appreciated!
iPhone 4S, iOS 6.1.3