[salmo]

Try two destroy-group triggers (for the same vehicle) attached to 2 spawn-group actions (one for each He111 group). Action name must be identical to the relevent trigger name. Something like this ...

[PARTS]
  core.100
  bob.100
[MAIN]
  MAP Land$English_Channel_1940
  BattleArea 174580 194813 108250 74438 10000
  TIME 12
  WeatherIndex 0
  CloudsHeight 1000
  BreezeActivity 10
  ThermalActivity 10
[splines]
[AirGroups]
  BoB_LW_KuFlGr_706.01
  BoB_LW_KuFlGr_706.02
[BoB_LW_KuFlGr_706.01]
  Flight0  1 2
  Class Aircraft.He-111H-2
  Formation VIC3
  CallSign 26
  Fuel 100
  Weapons 1 1 1 1 1 1 1
  SpawnFromScript 1
  Skill 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3
[BoB_LW_KuFlGr_706.01_Way]
  NORMFLY 258970.100 214280.15 500.00 300.00
  NORMFLY 222071.90 230428.05 500.00 300.00
[BoB_LW_KuFlGr_706.02]
  Flight1  11 12
  Class Aircraft.He-111H-2
  Formation VIC3
  CallSign 30
  Fuel 100
  Weapons 1 1 1 1 1 1 1
  SpawnFromScript 1
  Skill 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3
[BoB_LW_KuFlGr_706.02_Way]
  NORMFLY 258600.70 213920.04 500.00 300.00
  NORMFLY 222348.65 229874.48 500.00 300.00
[CustomChiefs]
[Chiefs]
  0_Chief Vehicle.AEC_Matador gb 
[0_Chief_Road]
  224676.28 228375.41 38.40  0 4 4.17
  S 2167 3 0.50 5.00 P 224686.52 228407.25
  S 2167 0 0.24 20.00 P 224760.03 229823.34
  224759.23 229827.11 38.40
[Stationary]
[Buildings]
[BuildingsLinks]
[Trigger]
  vehicle_destroyed2 TGroupDestroyed 0_Chief 100
  vehicle_destroyed1 TGroupDestroyed 0_Chief 100
[Action]
  vehicle_destroyed2 ASpawnGroup 1 BoB_LW_KuFlGr_706.01
  vehicle_destroyed1 ASpawnGroup 1 BoB_LW_KuFlGr_706.02