I have a Mac running OS X 10.8.2 with iPhoto 9.4.2 (710.42) and an iPhone and an iPad, both running iOS 6.0.1.
In iPhoto, I import photos from a memory card that I use in various digital cameras and organize them by events. I view photos inside events ordered by date in ascending order. This is also the order that I want to see my synchronized photos on my iOS devices (and which I did see in the past). I sync my photos from iPhoto via iTunes by the option "Select albums, Events and Faces automatically".
My most recently imported events cause some problems on my synchronized iOS devices. Now the photo order in the iOS "Photos" app is broken in the Events view. All photos that are taken in upright format appear BEHIND all photos taken in landscape format within an event. However, I want them to be sorted by date irrespective of the picture rotation, just as I see them in iPhoto on my Mac.
Events that I had imported earlier (before ~ mid October) are still ordered as expected, just as I see them in iPhoto.
According to this, the sorting of iPhoto should be preserved: http://support.apple.com/kb/HT4221
I assume that photos of newly imported events are displayed on iOS devices in the order of modification date instead of creation date (EXIF) since iPhoto automatically rotates pictures that are taken in upright format by 90° and saves them as 'modified' files besides the 'original' files. I also assume that photos of my older events are displayed in correct order on my iPad since they had already been synchronized at a time when everything worked as expected. I also tried to re-synchronized these older events on my iPhone (to see what happens) by unchecking "Synchronize Photos" -> Apply -> checking "Synchronize Photos" -> Apply and on my iPhone, those older photos are also out of order now.
Also note that my photos are ordered correctly in the "Albums -> Photo Library" view on iPhone and on the "Photos" tab on iPad. These are the same pictures as under Events. So the sorting is wrong in the Events view of newly imported events only.
I know that there are some other discussions about the order of photos on iOS devices. I want this one to be specifically about problems with a synchronized iPhoto library. Anybody else experiencing this issue?