Because catgirls, foxgirls, and such are anthro. You're being a stickler about the level of it. I'll invite you to actually read TFGames' description on it...
Anthro = Anthropomorphic creature transformation [TF], a being is transformed into a humanoid version of an animal (e.g. catgirl, werewolf, antgirl, etc.)
I don't appreciate you trying to frame it as lying just because it doesn't match your personal preferences.