Your assistance please - Components limit

[SQUIRE]

I've edited the components file with various items. It works and runs... but I placed 'Restrictions := Four Per Vehicle'. I works on players but I found that the computer defies this rule and places about 6 or so on a vehicle. So is there a reason why or a way to enforce the restriction ?

The long story here is a clip of the component code of one such item:
(the family # had to be changed due to that the limitation affected hence a standard one would be limited to 4 or the weapon series in general).

Name := HYBRID Anti - Proton Beam I
Description := Focused energy beam used as a medium range weapon. - LIMIT OF 4 PER CRAFT.
Pic Num := 18
Tonnage Space Taken := 6
Tonnage Structure := 6
Cost Minerals := 10
Cost Organics := 0
Cost Radioactives := 2
Vehicle Type := Ship\Base\Sat\WeapPlat\Drone
Supply Amount Used := 2
Restrictions := Four Per Vehicle
General Group := HYBRID-Weapons
Family := 122000
Roman Numeral := 1
Custom Group := 0
Number of Tech Req := 1
Tech Area Req 1 := Energy Stream Weapons
Tech Level Req 1 := 1
Number of Abilities := 0
Weapon Type := Direct Fire
Weapon Target := Ships\Planets\Ftr\Sat\Drone
Weapon Damage At Rng := 8 6 6 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Weapon Damage Type := Normal
Weapon Reload Rate := 2
Weapon Display Type := Beam
Weapon Display := 1
Weapon Modifier := 0
Weapon Sound := apbeam.wav
Weapon Family := 1