I have a fairly simple application:

Q1 is a P-Channel MOSFET and is having a flyback diode between drain >| source (which is not illustrated here).

Between ST1 and ST2 there is a 1k resistor to load the circuit by 5mA (BT provides 5V output).

However, unluckily BT1 is providing negative voltage when it is turned off (-3V).

So I came across with this circuit (by TI):

I have quite some question about this, and I couldnt really find answers:

1.) What kind of MOSFETs are being used? (N, or P channels?)

I believe they should be P-channels, as their arrow is pointing out from them. However, in my diagram, the arrow is pointing towards the source while these are pointing towards the drain.

2.) Is this only a drawing difference? With other words, which one of these two would be my Q1? Left one or the right one? (I believe right one based on the flyback diode).

3.) I can understand how this blocks reverse current when gates are on GND. However when they are opened up, I understand the right FET: current is flowing from source to drain (from left-to-right on the figure). But what happens with the left FET? Why would current flow from drain to source in a P-FET?