It's not the same music. OSTs tend to have more than 1 track.
He said Departure (Lullaby) in the IG post, right? Evgenia used that piece. But Alena's program has that combined with November, which is also by Max Richter but isn't from the Leftovers. And Evgenia's program had another piece from the Leftovers plus two other pieces by different composers. So it's not the same overall.