Something has gone wrong with the tailor. Again. Looks to me that certain armour items are being interfered with by certain costume options.
Fig 1. - Female Andorian Rebel Bridge Officer, using Mk XII Omega Armor. Unmodified outfit (obviously).
Fig 2. - Female Klingon Bridge Officer, using Mk XII Honor Guard Armour, wearing KDF Academy/Bortasqu' uniform.
Seems to be mainly to do with chest pieces.