Theres also a hidden countries one where Sudan overlaps with South Sudan. Generally it's not done though, as it can be very annoying.
Also, after looking at that quiz, I'm pretty sure the Kansas overlap is a mistake. There's a separate Kansas that becomes unavailable if you highlight the overlapped Kansas.
One of the state ones where Kansas is counted within Arkansas
Also, after looking at that quiz, I'm pretty sure the Kansas overlap is a mistake. There's a separate Kansas that becomes unavailable if you highlight the overlapped Kansas.