Uploading a comic book to iTunes: HELP!

I've tried getting my comic formatted for iTunes (well, iBooks really) and have run into a big snag. The pages don't line up properly. I took a picture of it and posted it here to show everyone here what I mean:

Please, anyone here who has uploaded a comic book to iTunes, have you had this problem? And if so, what can be done about it?

Order my book Jesus Needs Help on Amazon or download on Kindle. You can also read the first 18 pages of my next book for free at this link: The Hap Hap Happy Happenstance of Fanny Punongtiti