Carving to deep!

Probe thickness value incorrect?
That is about the only reason why the depth is incorrect on the first pass.

That is why I suggested a manual Z-zero and no probe.

Dp you mean a touch plate? If so Iā€™m not using one.

If you are not using one, but the system think you do - that could explain the deeper than intended first plunge depth you reported. Thats where I would look.

If you intentionally raise the bit 5/32" up before confirming your work zero, is the overall depth correctly carved?