I agree with Bob Calver
This process inside BiaB is a bunch of convoluted and confusing steps to me (sorry)
Doing the same thing in Realband is a walk in the park.
You bought Realband when you bought BiaB .. no cost to you to try it <grin>

Use BiaB to get your idea down (figure out chords, tempo, style)
Then open that same file in Realband and expand on the ideas
First of all you get 48 tracks in Realband, and you can cut/copy/paste/generate any sections of those 48 tracks you want. Basically you have 40 more 'Soloist' tracks to work with.

You can select the solo section and try a sax, guitar, flute and washboard .. then figure what parts you want from each .. or redo them all again until you get a solo you like .. without affecting any other tracks.
It is so much easier there.

The caveat is once you start down the RB path you'll want to use the SEQ file format for saving so you retain all this data, which means going back to BiaB means going back to where you were when you left BiaB.

That said, I never find myself needing to go back to BiaB.

I do not work here, but the benefits are still awesome
Make your sound your own!