HELP - Multiple MCP23S17

[MarcFinns]

• Arduino board: Arduino Leonardo

• Arduino IDE version 1.8.9

I built a custom board with two MCP23S17. They are on the same Chip Select, with different addresses (000 and 111). However, readGPIOAB returns the same for both chips, hence it appears I am not able to address them correctly. Reading the documentation i was under the impression this was a legit configuration. Do they require different CS? If so, what is the value of having the address pins? By the way, reset pins are connected to VCC. I did not implement a reset circuitry, which was working fine with a single IC. Help appreciated!