I'm not sure what is causing this but it's just this theme where it happens. Switching to another theme gets rid of the behavior below.

Essentially, every node with at least on comment has three 'pages' in the pager. Clicking on each shows no change to the page, but does advance the pager.

Also, the blog page shows the same three page pager when there should be something like 30-50 pages.

I seem to think I saw something like this a few years ago on a client's site, but I can't recall what the cause or solution was.

Ideas?