Mine did the same thing Ron. Actually, it's done it a few different times. One time preset 1 was on bank 6. I think it has to do with when you are hooked to the editor and making a lot of "send changes to PBC" commands. If I just power it up and use it normally at a gig, it never does it. But sometimes it does it when I'm making changes, like reordering presets and such. Doesn't always do it, so I can't nail down exactly what causes it...