When uprgading a unit (previously with a 'soldier's cloak') I added a 'Great Cloak' in the other category.  At this point, the great cloak appeared (eliminated soldier's cloak) but THE STATS REMAINED THE SAME in the unit design page.  (ie did not decrease attack and defense by one).

Upon building the unit, the stat decrease was present.

Also, in general the 'design' page has items appearing in the wrong category- soldier's cloak is appearing in the weapons, and many of the pieces of armor are shifted DOWN (ie greaves in the armlets section, etc)