Observation of negative voltage at the output of the op-amp
You're running the op-amps open loop so the slightest difference between the inputs will drive the output to saturation.1
Connect the output to the inverting input to make a unity gain buffer and the output should go to 0 V.2

1 Op-amps have very high gain of 100,000 to 1 million or more. That means that any input offsets due to imperfections of the op-amp get amplified by that factor and show up on the output. For that reason we use negative feedback to control the gain and correct any non-linearities in the amplifier.
2 With negative feedback the amplifier output will settle down when the inverting input is at the same voltage as the non-inverting input.