Keyboard sense wires for Z/Shift crossed?

[drj11]

Consider the bottom left of your keyboard schematic

I think you have the D0/D1 wires for the keyboard crossed. The Shift group should be connected to D0, you have it connected to D1 on your 74LS365 driver IC10; and Z is connected to D0, should be D1.

This project is amazing!

[drj11]

Actually, i see that the wiring is correct, but your D0/D1 labels on the symbol for IC10 need to be swapped.