Isn't it annoying, though, how you can't center the attribution of the image underneath the pin? Well, let me tell you, folks. It's a really simple fix.
We'll go from this:
Now, let's go to my favorite someecard board again. We'll let my screen shots do the talking.
After you've done all that, your image will not be centered when you click back over to "Compose". You can then select the image and center it in your post editor and all should line up!
If you are having trouble adding spaces in between pins or typing underneath your pin, go back to the HTML of the post and add the code <br/> wherever necessary. You should then be able to click back and type in some more text.
Hope this helps you in your adventures in embedding your pins! If you have any questions, feel free to leave them in the comments or shoot me an email.