Does anyone know how or why my Activity Log book has suddenly jumped from the default 16 pages to 32 pages?

I like to see all my games in the activity log, and I've always had trouble organizing it so that all the random system apps wouldn't clog up the spaces available for games.

I've not installed any patch for the app ever and I don't know of one that added this functionality. I checked my other console (which is also modded) to check I wasn't crazy, and sure enough, it only has 16 pages in the activity log. The only stuff I've installed lately is SpotPassDumper9 which is completely unrelated, and a patch that removes the camera shutter sound. I downloaded an unofficial Activity Log called Cthulu last year, but I know that I've only had these extra pages as of very recently (I only noticed now)

I guess that I have added some more games to the Activity Log recently, so my only possible theory could be that the app automatically doubled the amount of pages because I was starting to get close to filling up the total 128 slots that the first 16 pages have available. Does anyone have any knowledge about what's happened here?