Executor : light-lance and lance battery inconsistency

The Executor ship for Chaos is equipped with 2 weapons types :

  • Double-barrel lance battery weapons
    Icon shows 2 dots
    4 attacks
    4 damage
    8 seconds reload
    9000 units range
    1% crit chance

  • Double-barrel light lance battery weapons
    Icon shows 1 dot
    4 attacks
    4 damage
    8 seconds reload
    13500 units range
    1% crit chance

The only difference is the range and it is actually larger for the light lance version
How is it possible ? What does the 2 dots means if it is a less powerful version ?

Still not solved after the last patch 😕