I don't see any reason for it not working (tested on
www.weitzel.info/WB ... a 2.8 RC2 installation). maybe it's just a "process" misunderstanding on your side.
When you start a page you'll first of all have to upload the pictures and then create a gallery on the swift page giving it a title, pointing it to the right folder in media and maybe a description (if you want to). Then you click save.
If you choose "add gallery" at that point indeet it will "delete" everything you entered before.
Hope this helps
cheers
Klaus