I am the webmaster of Leslie's Artgallery [external links are visible to admins only] and I have the same problem
Most external links are indicated as referred from the page contact.html.
The real links on the contact page are indicated as referred from the page about.html.
I did some investigations by trying different configurations, without success. The result is always the same, it's not a temporary problem. I don't find any common points among the correct and the wrong references.
Thank you for your help.