@smbruker thanks for writing!
First, remember that real book and other lead sheets are never exact with the changes; they are more of guidelines. The changes I wrote to the transcription are reflecting more of what the band is playing on the recording.
For example, if you have a long I chord (in this case Fmaj7), often we would add II V movement in the middle, to create more interest in the harmony.
Also remember, real book changes are also often plain wrong.
For the left hand, please check the analysis, I’m attaching it here:
Bye Bye Blackbird Analysis.pdf (159.4 KB)
Thanks, let me know if you have any further questions!
-Tuomo