Please fill out the following sections to the best of your ability, it will help us investigate bugs if we have this information at the outset. Screenshots are especially helpful, so please provide those if you can.
Platform (Android, iOS, Website): Website
App version number, if a mobile app issue (shown under Settings or About):
Browser, if a website issue (Firefox, Chrome, etc) :
URLs (aka web addresses) of any relevant observations or pages:
It might not be a bug. Some pages on iNat count taxa a little differently (like your observations page versus a leaderboard page). Sometimes observations like one Felis not identified past genus and one Felis catus will count as two different things, but other times they’ll only count as one (you have one specific species identified from the genus Felis).
@m_whitson is right, the leaderboard only counts research grade observations at species level while the “species” page (for whatever reason) also includes reasearch grade observations at higher taxonomic levels (for example genus).