Having issues with anchor links on a page

The current page I'm having this issue with is this link, however I suspect it may be repeating on other pages too.

http://drgeraldlewis.com/disease-information/disease-vertigo/

I have a box with the 3 sections of the page in, which are supposed to link with anchor links down the page. They were working, but since the last update (I think) they aren't. The first link isn't going down far enough, the second is only taking it down to the first section, and the 3rd is showing the 2nd section.

Wondering if anyone has an idea on what has gone wrong, and how I can fix it (as if the anchor links don't work it makes the whole box redundant and I currently have the same setup on around 70 pages so I really need to get it working).

Any/all help much appreciated