Kuttenberg merchants have this occasional bug where when you open the interface
all armor values are red, this can be fixed by reopening the interface.
And no it's not cause of the default selected armor, when i say all armor is red I mean ALL
(in all slots).

Pricing error: the most expensive armor has the highest power rating and highest armor values,
except the milanese leg armor, it is way cheaper than the knights leg armor and has much better armor.
So the prices of those 2 items probably just need to be swapped.