Where your YouTube videos upload to depends on which account you're logged into in Premiere Elements, Moppett.
If you're seeing these videos while logged into another account, it may just be that Google/YouTube just recognizes your name or your computer and they decided to show you all of your accounts at once. Google's software is kind of sneaky that way.
Thanks for that Steve. I don't know if this is the only way - or whether it was a fluke - but before "Sharing" I opened Google (Firefox) using my preferred user name, and then went back to PE9, clicked Share and lo and behold it worked. Many thanks.