Missing light flak guns on my Type IX/D2
 

There is no option to change out my light flak guns to the 'flakzwilling" guns in the upgrade screen and no light flak guns modelled on my boat. I seem to recall there being a similar bug with the deck gun in stock SH4. Is there a fix to this. I'm bummed out that my boat doesn't look as decked out (no pun intended) as it could be.