Controlling image order in photo stream
I'd like to understand how iPhoto/iCloud controls the order of images in the Photo Stream. And specifically why does it seem to automatically reorder my images.
Today I loaded of images into iPhoto from the last two weeks of travel. The images came from several cameras with different file name sequences and clocks not all in sync. I created an album with a few hundred and ordered them for continuity but not chronologically. I then copied all the photos from the album to my Photo Stream, which was empty, and enabled streaming. After a few minutes of sync, the images appeared on my iPhone, in my desired order. Perfect.
Several hours later I noticed that the image order had changed on my iPhone. I went back to my laptop and found that the image order in iPhoto's Photo Stream had also changed. (I think something like this happened before with MobileMe and I was able to rearrange images using a browser to access the MobileMe Gallery directly no way to do this with iCloud.) I'd like to fix the order so that I can give a slideshow.
I'm using iPhoto '11 version 9.3 on MacOS version 10.7.4. I'm guessing this has something to do with file names or image chronology but a definitive answer would be appreciated. Thanks.