I looked at these links. In Chrome, NVDA was reading them correctly for me. In Firefox, I saw the behavior you described.

Looking at the  HTML rather than putting text into the <a> element, the designer used title to label the links. SO, my guess is that when focus is placed on the links with either k or tab, they are spoken but not when using the browse mode. I don’t know if this is a Firefox or NVDA bug.

Jonathan