Force specific liveries on vehicle for AI and force all vehicle EXTRAS

Greetings folks,

I'm searching for a way to force specific liveries on a vehicle for AI.  In this case I use a Chevy Suburban 2008 on the PRANGER (Park Ranger) slot. 

Using the default vehicles.meta modified to allow multiple liveries. Do you guys have any ideas? Everything else is default.

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Second thing is that I want to have all extras a vehicle model has to be enabled by default on any car, even AI.

My flags line is this:  

<flags>FLAG_EXTRAS_REQUIRE FLAG_HAS_LIVERY FLAG_EXTRAS_ALL FLAG_EXTRAS_STRONG FLAG_LAW_ENFORCEMENT FLAG_EMERGENCY_SERVICE FLAG_NO_RESPRAY FLAG_HAS_INTERIOR_EXTRAS FLAG_REPORT_CRIME_IF_STANDING_ON 
FLAG_PARKING_SENSORS FLAG_IS_OFFROAD_VEHICLE</flags>

My requiredExtras are:

<requiredExtras>EXTRA_1 EXTRA_2 EXTRA_3 EXTRA_4 EXTRA_5 EXTRA_6 EXTRA_7 EXTRA_8 EXTRA_9 EXTRA_10 EXTRA_11 EXTRA_12 EXTRA_13 EXTRA_14 EXTRA_15 EXTRA_16 EXTRA_17 EXTRA_18 EXTRA_19 EXTRA_20 EXTRA_21 EXTRA_22</requiredExtras>

Any idea why the cars are still spawning sometimes without the extras?

Regards,

Alex