Scale is selected - harmonic minor.
In step edit mode, if you press 2 keys at the same time (1 note in scale, 1 not in scale) , 2 notes will sound, but the second note LED will not show. It doesn't move to the nearest note in scale.
This can be confusing when listening back/editing a sequence. It shows one note when 2 (or more) are on that step.
When not in step edit mode, key LEDs will move to the nearest notes in scale, as it should be.