Info on Personal Public Page

If you look at your public profile here on the GPWA you can see some stats for your website. One being Domain Authority and the other links.

In looking at my sites for these stats I see my one site has 473 links but it says 472 are external links. I always read these links as being the total links for your site (internal and external) and external links are links pointing to your website. I guess first, is that the correct way to read these? Is that what the "links" are really saying?

If so, secondly, how can my one site have 472 out of 473 links be external? I have more than 1 internal link? I guess for this site it could just be flawed but I do have other websites listed where the links are also very close. Like 429 total links and 425 of them being external links.

What do you guys think? If I am reading these wrong please explain how to read them and if I am reading them right how can the above be?

Thanks - travis