Passengers shooting, then Vehicule Flat Out?

Is the following legit or not?

Movement Phase:
1. My Raider moves by 6"
2. Passengers prepare their weapons quietly on board

Shooting Phase:
1. I declare shooting with the passengers
2. I declare Flat out with the Raider
3. I resolve all the passengers shootings normally
4. The Raider cannot shoot as it will Flat Out
5. I move the Raider 18"

but at page 426 of the BRB, the table states that if a vehicule Flat Out passengers cannot shoot.
I think I miss something in the above simulation. Is this because "shooting" and "moving during shooting phase" are resolved simultaneously ? (so passengers cannot shoot as they are already far away!)

From the rule book FAQ

Q: If a Transport vehicle has a unit embarked upon it, and that
unit makes a shooting attack, can the vehicle then move Flat Out in
the same Shooting phase? (p78)
A: No

thank you mush ... I always forget to refer to this *#@!! FAQ ...

No worries! GW and confusing rules go hand in hand.