But still the left PNP transistor is shown as turned ON, isn't this a problem?
The transition fron "Off" to "On" does not happen at an exact point, it is a curve.
And most datasheets give a threshold range, not a single value.
The threshold voltage in simulide is a simplification, it starts to conduce before this point.
The change of color occurs just when it starts to conduce, even if it's only a few uA.
This can be misleading. Perhaps I should use Vthreshold or use 2 colors.
In this case that transistor is exactly at the point when it starts conducing.
And that is an issue in your circuit:
The voltage drop in the multiplexer is equal to Gate_to_Source Voltage in "middle" and "Bottom" cases, where N channels are used.
So the voltage that the P channel after the AmpMeter is receiving is equal to that voltage, so it will never be totally turned Off.
It is conducing just a little bit, much less that the transistors below that are totally On, so the circuit works fine.
If you want that transistor to be totally turned Off yo should use a threshold greater than the threshold used for the multiplexer N channels. For example 0.7 Volts.
Or find some other solution.
Also the wire is blue and not red.
Wires threshold is 2.5 V and voltage is 1.16 V.
I think it would be good if this threshold was also configurable.