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.
Am7
bar 1 · bar 2 · bar 3 · bar 4 · bar 7 · bar 8 · bar 11
LH A2 E3RH C4 G4 B4
Dm7
bar 5 · bar 6
LH D3 A3RH F4 C5 E5
Bm7b5
bar 9
LH B2 F3RH D4 A4 C5
E7alt
bar 10
LH E2 Bb2RH G#3 D4 F4