The Chords in your Bb Faike Books are transposed to Bb so that you can use them to play improvised solos over the changes or analyze the chord progression to do things like that with it and not have to also deal with transposing the chords from Concert C to your Bb instrument. And since the notes are already transposed, the chords above them should match.


The Rhythm instruments should not be using the Bb chart to play off of anyway. But if they do, they have to transpose the chords down one step.


--Mac