Jeff,
You only put one picture in your post. When you use the app you have to put each picture in separately. Upload one, copy the URL and paste it into your post. Upload another, copy the URL and paste it into your post. Continue this until all picture URL's are in your post. I helps to put a blank line (RETURN) in between each picture.
When all the URL's are in the post then hit "post" and they will all show up.
I usually open the app in a 2nd window and just switch back and forth between the two.
In your picture post above you only have one picture URL from the app in there.
Barney