Check the pin. Usually the sear pin is not a right fit to the housing...it "wiggles" a bit. Part of your lean might be that the pin is being pushed up. Normally, BOTh ends are in a recess, which limits how much it can move.
Yes,,,the sear is usually a loose fit on the pin. Would be bettter if it were a tighter fit, but it dos need to rotate freely....hasn't been a problem, but might vary trigger pull a bit.