Image handling

I’m a bit confused about image handling. I’m not sure if what I’m seeing is the way it SHOULD be or if its a bug.
I’m broadcasting from siteA.com to siteB.com. The post I’m broadcasting has an image placed using WPs default Add Media button. Here is the example code from the post on site1.com:
[caption id="attachment_3911" align="alignleft" width="1313"]<img class="size-full wp-image-3911" src="http://siteA.com/wp-content/uploads/sites/2/2013/02/Square-Dancers.jpg" alt="Dancers Rehearse" width="1313" height="875" /> Dancers Rehearse[/caption]

After broadcasting, here is the same code as it appears on siteB.com:
[caption id="attachment_3998" align="alignleft" width="1313"]<img class="size-full wp-image-3911" src="http://siteA.com/wp-content/uploads/sites/2/2013/02/Square-Dancers.jpg" alt="Dancers Rehearse" width="1313" height="875" /> Dancers Rehearse[/caption]

Now siteB.com has an entry in the Media library (ID 3998) which lists the file URL for this file as:
http://siteB.com/wp-content/uploads/2014/10/Square-Dancers.jpg
but its displaying a broken image icon because Square-Dancers.jpg does not exist in that location within siteB.com’s uploads folder. I can’t find it anywhere in siteB.

The image in the broadcasted post is still displaying properly, because it is still linking to the image on siteA.com.

So my question is, what is supposed to happen that isn’t? Either:
A. the image is supposed to be getting copied to siteB in the location listed in the file url field in the Media Library entry. AND the url in the post should be changed to that url as well.
B. The media library entry should be keeping the file url the pointing to the file on siteA, so that it doesn’t appear to have a broken image link.
C. There shouldn’t be a media library entry created at all.

I feel that something isn’t working as intended, but I’m not certain what’s intended. I can live with the result for now, since my images are appearing in the siteB posts (linked to the images stored on siteA), but I don’t like having those broken images showing up in siteB’s media library.

Any ideas?

https://wordpress.org/plugins/threewp-broadcast/