I noticed this today, 2 different Liftime Tags for the same effect, seems odd:

<!-- Begin Improvement -->
 
  <Improvement>
    <InternalName>HyperionSensorSystem</InternalName>
    <DisplayName>HyperionSensorSystem_Name</DisplayName>
    <ShortDescription>HyperionSensorSystem_ShortDec</ShortDescription>
    <Description>HyperionSensorSystem_Dec</Description>
    <Icon>HyperionSensorSystem.png</Icon>
    <BuildIcon>HyperionSensorSystem_Build.png</BuildIcon>
    <ListIcon>HyperionSensorSystem_Icon.png</ListIcon>
    <ImprovementType>Military</ImprovementType>
    <PlacementType>MilitaryUnique</PlacementType>
    <IsPlayerWonder>true</IsPlayerWonder>
 
    <!-- Stats -->
 
    <Stats>
      <EffectType>ManufacturingCost</EffectType>
      <Scope>Queue</Scope>
      <Target>
        <TargetType>Improvement</TargetType>
      </Target>
      <BonusType>Flat</BonusType>
      <Value>151</Value>
    </Stats>
 
    <Stats>
      <EffectType>Maintenance</EffectType>
      <Target>
        <TargetType>Improvement</TargetType>
      </Target>
      <BonusType>Flat</BonusType>
      <Value>1.5</Value>
    </Stats>
 
    <!-- Triggers -->
 
    <Triggers>
      <OnEvent>OnConstructShip</OnEvent>
      <Scope>Queue</Scope>
      <Target>
        <TargetType>Ship</TargetType>
      </Target>
      <Lifetime>Target</Lifetime>
      <Modifier>
        <EffectType>SensorPower</EffectType>
        <Target>
          <TargetType>Ship</TargetType>
        </Target>
        <BonusType>Multiplier</BonusType>
        <Value>0.1</Value>
      </Modifier>
    </Triggers>
 
    <!-- Level Effect Trigers -->
 
    <LevelEffectTriggers>
      <OnEvent>OnConstructShip</OnEvent>
      <Scope>Queue</Scope>
      <Target>
        <TargetType>Ship</TargetType>
      </Target>
      <Lifetime>Instant</Lifetime>
      <Modifier>
        <EffectType>SensorPower</EffectType>
        <Target>
          <TargetType>Ship</TargetType>
        </Target>
        <BonusType>Multiplier</BonusType>
        <Value>0.1</Value>
      </Modifier>
    </LevelEffectTriggers>
 
    <!-- Level Effect Stats -->
 
    <!-- Adjacency Bonuses -->
 
    <NeighborBonuses>
      <GiveBonusToNeighborType>Military</GiveBonusToNeighborType>
      <NeighborBonusValue>1</NeighborBonusValue>
    </NeighborBonuses>
 
    <!-- Prerequisites -->
 
    <Prerequ>
      <Techs>
        <Option>StellarCartography</Option>
      </Techs>
    </Prerequ>
 
  </Improvement>
 
<!-- End Improvement -->