I'm using the Choices theme and WP 3.5, and I'm having the same issues as in this closed post:
When you have a slideshow with many images in it, it is simply not practical to order the images by dragging and dropping every one of them!
Is there any way to get the sorting buttons labeled "Sort Order: Ascending | Descending | Clear" in the Gallery tab of the "Add image to slideshow" popup window to actually work?
The only thing I can think of as a workaround would be to use an image management program (like Adobe Bridge) to rename all of the images you want to upload into a slideshow using numeric suffixes (image-01, image-02, etc.), but to number them in REVERSE order before dragging and dropping onto the "From Computer" tab......
Obviously, this is not a desirable workflow! Users would then need to rename all of those images to something useful because those filenames appear in the theme. And if you've ever tried to rename 50+ files in a slideshow by clicking "All Tabs: Show" and expanding each image entry in the list to manually rename them all in Wordpress, you will know how time consuming this is!