Kev,
1. Your modeling Rumble might be a Stage 800, or a Studio 40, but
not a Studio 800.

B. "Setlists" is the general term used on page 34 of the manual for favorites list, gig list, rehearsal list, any list of presets you intend to use in a certain order. Look in your Setlists for the default name "Setlist 1" that contains the "#20 Basic 300 Pro Dirt" preset. You can also rename your Setlists to something more descriptive, if you wish.

You're
not the first to have this happen, Kev. But you, and JakobT, came to the right place for answers.

.