To upload photos from PSE9 to Photoshop.com, add the photos to an album in PSE9 Organizer. Then in Organizer Preferences > Backup and Sync, ensure Sync is enabled for the album.
Also, in PSE 9 Organizer, you should have the option Share > Online Album > Share to Photoshop.com. If you are not already signed in, you will be asked to do so. Backup and Sync must be Enabled for this to work.