Leaderboard

I'd start with a guess there is a filter applied that is limiting the search. On the main cachly screen that is displayed when you launch, to the right of the field near the type that shows "Location, GC Codes, coordinates" is a small circle with a gear icon. When you click that, it shows your search options/filters. You can go through that and see if there's anything set you want to adjust or click "Reset" in the top left and go back to the defaults which should display all caches.