Ok, for the Gripen double cockpit issue.
I think it has something to do with both Lods for the airframe and the cockpit showing up and the cockpit position being out of sync with the airframes pilot position.
In the cockpit ini change the CockpitSeat entries to:-
[CockpitSeat001]
ModelName=Cockpit
Position=0.0000,4.40,0.6
ViewAngles=0.0,0.0,0.0
MaxYaw=178
MinYaw=-178
MaxPitch=90
MinPitchFront=-50
MinPitchRear=-35
LightRange=1.5
LightInnerConeAngle=50
LightOuterConeAngle=60
LightAngles=0.0,-30.0,0.0
DiffuseLightFactor=0.5
NightLightOn=0.25
NightLightColor=0.25,0.88,0.25
Gunsight=GunsightFront
Hopefully that should sort it.