Apologies in advance to such an erudite and intelligent person such as yourself, Mr C., but are you really really sure you don't have the "play in random order" button pressed ? No, thought not, shouldn't have mentioned it.
My own devices play firstly in alphabetical order and then numerical order,
so Rolling Stones track 8 is played before The Who track 6. (Gives you an idea of my musical taste).
Incidently the whole of the Magic Flute is played in the correct numerical order, although the volume needs turning down for The Queen of the Night's magnificent blast. Would have been nice to hear Keith Moon do the percussion on that little number.....