OK, this means they were uploaded to your personal folder so only those logged in can view. To upload them directly to the article, simply click and drag them from your desktop into the edit area. They will upload and be saved to the article. This is so they won't get lost. I have just done this.
I also uploaded them as thumbnails. They're still in the same original size but you have to click them to view them at full size. If you wish to display them as full sized pics, you can edit the article by editing the article, deleting the thumbnails, and with the cursor where the pic used to be, scroll down to where you see the uploaded files. Then click full size instead of thumbnail.