Some games can't be trusted. Labelled as a particular genre, sold as a particular genre, hell, maybe even be designed as a particular genre, they nevertheless refuse to do as they're told and instead play as something completely different in reality.
Sometimes it's a good thing, introducing players to genres they'd ordinarily never touch, hidden under the guise of something else. Sometimes it kills the game's chances dead, leading to its evaluation on the wrong terms entirely. And sometimes... Sometimes it's just plain old confusing.