Corrupted_Desire

So I'm designing a ship for mission super dreadnaught or battle cruiser and I was looking at the accuracy of my big guns and lighter shells (That should improve accuracy lower it, and heavy shells increase my accuracy? I then looked at other various modifications and anything that supposed to give base accuracy lowers it and anything that improves gun range seemed to raise it despite the red negative multiplier for accuracy. Is this bugged or have I been doing accuracy wrong this entire time?