Currently there are two different ways to add pictures to your post. I am working on making this an easier task, presently there is the ability to use an image that is already on a website, or online. To do that you take the address of the image,
for example Bullet Tools logo is located at
www.bullettools.com/images/logo.pngI can add this to my post two different ways, when you are in the edit mode there is a graphic that looks like this

This will add tags to your post if you click on it, and you put the address inside of those tags and it will be displayed in your post.
Also at the bottom of the edit window when you are creating a post or thread there is a check box that says
"Attach files to this post?" if you check mark the box it will have you attach files after you click post, this will add them to the bottom of your post, however sometimes when using attachments the images may not show properly.
Does that help? Hopefully I didn't make things harder to understand...