Sorry but the message you got confused me and I guessed someone else would answer. When adding photos you click on the postcard icon to the right of the paper clip icon in the toolbar and select where on your computer you want to copy the photos from, hit Upload and they appear where you left the cursor in your post. Does that make sense? Describing what I do more or less without thinking is tough to write down.
You can add them all in one action by holding the control button down and rearrange them before uploading if you want.