For some reason, some of the time I've noticed that my "load more" links load completely the wrong content. These links previously would load the next page inline, and render the new content without a page load. I liked this as a compromise between traditional full pageload paging and infinite scroll. However, I've been seeing it behave strangely the last week or two, sometimes loading duplicate content, or the page scrolling strange after clicking it.
I removed the Javascript bit from the feature, and renamed the button to "next" instead of "load more". This way I will be better able to diagnose the problem when it happens again, since there will be fewer moving parts involved. Hopefully I will be able to track down the underlying cause soon.1