Battleship Isis has a light mortar?

[Heartless]

So with my cap ships I actually like to "copy" the weapons outline of the npc's; atleast the weapons.

Now, I did this with my Osiris and the Isis down to everything, except the Isis has a light mortar eqquiped. Light mortars are only available for Cruisers, and for Battleship's there are mortars and heavy mortars.
Now I think I "recall" the Isis having a mortar/heavy mortar and a bit different weapons array including a missile launcher.

But now that that changed, how is it possible for an npc BS to have cruiser weaponry?

Is this even a bug?

Here's the shot I took:


So yes, due to my OCD-ness paranoia, I decided to replace this with a Mortar, as a Heavy Mortar takes way too much energy for an Osiris to fire it effectively.

Oh, and I also recommend changing the light mortar to a normal mortar once the chance arises for it to make more sence.

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SwissScorch --> Heartless