The first time that you manually save a Pages document, will trigger autosave about every 10 seconds afterward when changes have occurred. After opening a Word document, and then saving the resulting Pages document, you will have two document icons with potentially different names, but the icons tell the story:
You may want to get the free iBook, Pages User Guide for Mac, and load that into your iBooks application to provide further instruction. You can always post question in this Pages for Mac Support Community too. We are open 24x7.