You probably used one page as a template for all the others?
Each navigationbar button has an unique id, but if you simply make a copy of the same file, this id will no longer be unique (because you have two documents with the same navigationbar) and when publishing it will override the old ones.
Workaround:
1. Select the navigationbar click copy.
2. Click paste
3. You now have two identical navigationbars
4. Delete the old one.
BlueVoda now has generated unique id's for you navigationbar.
Do this for all your pages.
Forum Moderator
BlueVoda Specialist