I assume you uploaded from a phone? That is an issue with some phones that we discovered during testing. Once uploaded the person can view and flip the picture in the gallery but there is no way to save the rotated picture.

It is a result of how some phones attach extra data to the photo -- works great for viewing the photo on a phone, but not for the gallery.

It can be fixed, but on your end and computer. Think their is also a app that can strip out the extra data that causes the problem, but it might also break it for viewing on the phone, not sure about that. I know that the instructions have been posted, will see about finding them or have Beachkitten repost the instruction here as an FAQ.