You are technically right. The incest content, dad and daughter, was changed by the creator of the game to be a guardian and ward relationship.
Be prepared to see this a lot when it comes to games with the incest tag and a link to Patreon, because Patreon recently banned incest content. So, to keep their product on Patreon, which is still a good website all things considered, the incest creators had to alter the incest content within the games to be non-incestuous (essentially just changing the relationship of the characters and some dialogue variations).
However, don't fret too much: look within any "incest" game's thread for an incest patch for the most recent version of the game. Download and drop it into the "game" folder within the currently non-incest Ren'Py game, it will more or less restore all of the incest content. So, that's why the incest tag remains, despite the core game no longer having actual incest.[/QUOTE
I know I was seeing incest patches showing up. I just was not getting why they had not remove the incest tag until you said that thank you