please apple tell me what I have to pay for that a better solution? I will do it! Photostream makes sense only with possibilties to sort the photos inside a stream! and to sort the streams !! you did such a great job with icloud and photo stream - but it is not finished!!!!
Thanks a lot in advance!
You are trying to use Shared Photo Streams as shared Photo albums or slideshows, but they are intended as communication channels, not as online albums. If you treat them as streams, as they are intended to be used, it makes perfectly sense, that the images appear in the order they have been added. Drop a photo into the stream, your friend will send a different photo back, etc. Any other sort order would make the streaming cumbersome, when the stream gets long. You will want to see the most recently added photo at the head of the stream, to see immediately what is new. iPhoto on iOS device has web journals and slideshows to share online with friends, but in iPhoto on a Mac these are still missing.
I'd like to encourage you to send feedback about the usuability to the developers. After all, right now the iCloud drive and the new Photos.app for storing photos in the cloud is under developement. Since nothing at all has been announced yet how this feature will integrate with iPhoto and Aperture on a Mac, feedback will be very useful.