Thanks.
I'm not sure that the explaination though. Here is why I doubt.
While testing with Cachly 2.0.3 (4) on my iPad (iOS 9.3.5), I finally faced such a trouble with my own account : with my account some caches were not displayed (mine). After checking the settings, I saw that my own caches were not supposed to be excluded. Worst, no cache type, no D/T and no cache size can be selected/deselected. Whatever I select, Cachly says that at least one type must be selected. Only possibility is to kill the app and restart it. I tried a couple of times with same result.
Well, let's assume it's groundspeak restriction. Then why does it work for my account on other device (same cachly version, iOS 10.3.1) ? While for my daughter it works with no device.
Also after removing Cachly and re-install it on the iPad, the bug disappeared for my account (still remains for my daughter's account).
It looks like a "search" function settings bug.