Hi, the reason is simple, R1, R2 and L are completely different parts to Parts 1 to 16 on the 7k and therefore you would not expect them to change. There is a GM playback mode where you can choose whether to have R1, R2 and L as Parts 1 to 3 or not, but panel memories are not a GM function since nowhere in the GM spec. The 7k has increased polyphony and one of the advantages is to play R1, R2 and L direct as separate parts on top of any 16 track
midi.