A W, like stairs: back-left corner, back edge, right edge and front-right corner. The front-left corner's yellow faces left.
Algorithms
L' U' L U' L' U L U L F' L' F
12 moves · with the left hand
YOURS
Built from
L' U' L + Sexy move + U + Sledgehammer
Loose moves
L' U' L
Trigger
Sexy move · mirrored and backwards
U' L' U L
+ U
Trigger
Sledgehammer · mirrored
L F' L' F
Relations
Mirror
OLL 38
Your algorithm backwards
F' L F L' U' L' U' L U L' U L
solves OLL 32
That's why your scrambles are never the inverse of the algorithm: you'd be practising OLL 32 without knowing it. CubeDojo builds a random state with this case and checks it comes out.