Hi Willum and Audrey,
I will address playing someone else's music and then following with my own live playing or using the SEQUENCER. The way I get around this is to make a special save of three things: Save ALL PANEL MEMORIES, SOUND MEMORY and CUSTOM STYLES. It is very wise to do this because putting in someone else's music can kill a lot of work that you have created and you can't get it back unless these features are saved. Invariably, people use their own sounds or use sounds that are originally in the SOUND MEMORY. If one changes a lot of sounds and stores them in SOUND MEMORY and doesn't save them, they are gone and no way to get them back.
One of the things that really irk me is to forget to click off the SEQUENCER button when playing live. Regardless, when going to a saved PANEL MEMORY, it doesn't automatically negate the SEQUENCER being on. This is one of the things that Technics should have corrected even in previous models. It can be very embarrassing to start to play live after playing a song in SEQUENCER and the song start to play as you are starting to play live.

Scott