When a search results in more than one page of results, the first page is sorted by date posted. Clicking to the next page shows the results alphabetically. Clicking back to the first page finds it too sorted alphabetically.
This makes it more difficult to follow a series, especially in a large group of results, such as The Swarm Cycle. The fact that the initial page is re-sorted by clicking to the next page and back makes it appear to be a bug.
Thanks for listening
smitht