NPCs don't mount the turrets of vehicles.
I have added the insurgent and the menacer in dispatch meta so that in 5 stars wanted level, the army will come after me with those 2 among other vehicles. By adding the flag "LAW ENFORCMENT" in vehicle's meta they spawn with 2 marines inside (if I don't add it, they spawn with only one npc as I have noticed). The problem is that the second npc doesn't mount the turret, but the co driver seat. Their vehicles meta have the flags "HAS_TURRET_SEAT_ON_VEHICLE" and "PREFER_ENTER_TURRET_AFTER_DRIVER" and when I drive them and I spawn a bodyguard npc he/she enters and mounts directly the turret as it is supposed to be. But as I described above, there is no npc mounting when the vehicles are spawned in 5 stars. Any suggestions? Thanks!

@JustHelpMeFixMyMods Hi there! Did you find any solution to the casino disappearing poblem after the tests that you run? What was causing the problem?

@Viccracenvy I want to increse not decrease the number of cops per car. What I did was to add some swat officers (6 in total) in <PedModels> of SWAT_JEEP and change the number το 6 in
<NumPedsToSpawn value="6"/>
<DispatchVehicleSets>
<Dispatch>SWAT_JEEP</Dispatch>
I tried the same with 4 swat peds but there were always 3 swat cops per fbi2 and sheriff2 cars. Can you please make a test in order to increase the number or swat cops per car (from 3 to 4 or to 6) and report back?

@Viccracenvy I've just tested this with swat vehicles and I didn't have any results. Anyone else tried it?

@epoqx Viccracenvy is right. I've done that once by accident (and I don't remember how). I had the police patrol cars spawn with 4 cops instead of 2. I hope that he can let us know.

@Viccracenvy Can you please let us know which line and how you must change in order to have fbi2 and sherrif2 with 1 driver + 3 passengers?

@Icen I have the same question. There was a recent post regarding the same thing but no one had an answer (at least share one). https://forums.gta5-mods.com/topic/27713/can-i-control-how-many-officers-in-one-vehicle
But as you write in your post you have a knowledge of dispatch.meta. Coud you please tell me how to "adjust the amount of dispatch"? Thanks

@Reyser Thanks! But from yesterday I have restarted my pc some times anyway. What I've noticed is that the OpenIV starts normaly most of the times but when I try to open some ytd files it crashes. No doubt the developers have to fix a couple of things.

I don't know if we are talking about the same thing but when I installed the 4.0 OpenIV yesterday it kept crashing on opening (the OpenIV's blue error screen appeared). I solved it by downgrading my GTX 760 drivers to an older version. As I can see in the forum of OpenIV site, many people report the same problem.

@TRDOffroad97 In the AI vehicles. Every fbi2 car to have let's say 5 or 6 swat officers instead of the 3 that it originaly has.