The form
One bar carries two chords. The transcription writes both chords' notes together without saying which note belongs to which, so that bar is printed and not drawn — a keyboard guessed from an ambiguous line would show a chord nobody plays.
The hands
Left hand then right, as the source writes them. A pianist's voicing routinely carries a colour the chord symbol does not spell — a flat ninth over a dominant, a ninth on top of a seventh chord — so the notes printed under each keyboard are what is actually played, rather than what the symbol alone would predict.
F7
bar 1 · bar 2 · bar 3 · bar 4 · bar 7 · bar 11
LH F2 C3RH A3 Eb4 G4
Bb7
bar 5
LH Bb2 F3RH D4 Ab4 C5
Bbm7
bar 6
LH Bb2 F3RH Db4 Ab4 C5
Minor iv - gospel move
D7
bar 8
LH D3 A3RH F#4 C5 Eb5
Gm7
bar 9
LH G2 D3RH Bb3 F4 A4
C7
bar 10
LH C3 G3RH E4 Bb4 D5