Hi,
As I was using the App, I found out that I can not delete the manga chapters that I already had read from the app. This would be a great addition to v1.1 or so.
Another is the ability to choose only the chapters that were unread, or manually add the chapters that you wanted to sync. This function is the same as in iTunes in which you can sync only those you wanted.
Thanks again and this a very good program. I would like to help in any way possible but so far all I can do is create .manga files for everyone to see.