Thanks. For me the mobile app is behaving in the same fashion. I just called LATAM and they can see that my seats have been allocated (and sent the booking confirmation showing seat numbers). However, they're still showing to me online as unassigned. Also, if I go into 'Detail' for each leg, I get an error message (this functionality is fine on other bookings). So, something not quite right but not much I can do except hope all is ok.