To tell a story with your pictures it's nice to put some words above each picture.
Right now all pictures get uploaded and they all appear in a bunch.
To move them around you need to:
You must be using the Advanced/WYSIWYG editor (found in usercp-edit options)
upload all your pictures as normal
pull down the Attachments (paperclip) menu and place the Attachment wherever you like within the body of your post.
Now you can write a description of what the picture is about