Seems like the Game isn't updated at all anymore but in the Case that I might be wrong about it, here's a Bug I've encountered.
When a Tyrannosaurus (probably the same with other large Carnivores) kills Velociraptors, they aren't counted towards its Kill/Victory Count
When a Tyrannosaurus (probably the same with other large Carnivores) kills Velociraptors, they aren't counted towards its Kill/Victory Count