Don't really understand what you're saying, but it sounds like it's on Live mode.
Song mode is much easier to start with.
If your navigation screen looks like
P
S C P I T
G
You're in the clear and I'm wrong. S indicates song mode.
If it looks like
P
L C P I T
G
I'm guessing right and you're in Live mode. If so, go to song screen, hold select and press left. this will change live mode to song mode. Pressing Select+Left again will change it back.
Also, most composers don't fill the chains. They only use around 4 phrases per chain, (https://www.youtube.com/watch?v=OGwSr7KFcPM) depending on the song.