@DustinNwind, please post photos of your actual installation?
The fact that your starter battery voltage reads the same as your monitored battery voltage is generally indicative that something is connected incorrectly - my guess would be that perhaps you've connected the BMV main power supply wire to the B2 port instead of the correct B1 port on the shunt, but I could easily be mistaken about that, thus my request for photos of the installation:
*photo of the BMV shunt and PCB wiring, including both connections to the main battery bank;
*photo of output wiring from Orion to target battery bank
*photo of input wiring from start battery to Orion
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