using controller for flying
There's nothing wrong with that, people use controllers for some specific segments in GTA V for example.
Changes to the GTA:SA leaderboard
The GTA:SA community has been deteriorating over a long period of time. Many top runners are not currently present on the leaderboard. This issue has not been seriously addressed yet, but an attempt will be made to remedy it now.
As of this news post, the San Andreas leaderboard will function in
Recent runs