iBooks is not all that standard and can do some funky things with ePub. My suggestion is to get Bluefire Reader for the iPad and use Bluefire. Bluefire uses ADE so an ePub that looks good with ADE will look good with Bluefire.
There is a thread for Bluefire if you need/want help.
https://www.mobileread.com/forums/sho...d.php?t=101992