somethings not right with the stock O2 signal. It should be .390 to .450 when the sensor is disconnected.
disconnect both orange and purple Gen2 wires and see if the stock o2 reading changes (stock O2 still disconnected).
generally, with these plug and play adapters, I tell guys to cut the orange and purple wires of the adapter and connect directly to the wideband,
the ecm can't do anything with the wideband signal, no need to run it there.
B