Facebook Comments / Same Comments Every Post

I’ve got Facebook Comments enabled on my site, but it puts the same comments on every post.

I think I know where the issue is. I just don’t know how to resolve it.

Basically, this is the code for the comment section, as I’m using it:

<fb:comments href=”<?php the_permalink(); ?>” xid=”<?php the_ID(); ?>” width=”572″></fb:comments>

In theory, it should populate the permalink section above with the page of the site the comment’s being left on.

But, if you look at this post…

http://www.runhundred.com/workout-music/snoop-dogg-wiz-khalifa-bruno-mars-young-wild-free-96-bpm/

…then look at the page source in a browser, you’ll see that the permalink that shows up next to fb:comments is this one:

http://www.runhundred.com/workout-music/dj-merritt-blake-potter-stick-of-sin-132-bpm/

So, I guess my question is this: Why is the site pulling up the latter permalink, not the one of the post being viewed?

Any ideas would be appreciated.

Thanks.